Rename length-related types

`Fractional` => `Fraction`
`Relative` => `Ratio`
`Linear` => `Relative`

34 files changed, 491 insertions, 503 deletions

diff --git a/src/eval/content.rs b/src/eval/content.rs
index 01b43473..3c1fb310 100644
--- a/src/eval/content.rs
+++ b/src/eval/content.rs
@@ -456,7 +456,7 @@ impl<'a> Builder<'a> {
                     })
                     .unwrap_or_default()
             {
-                par.push_front(ParChild::Spacing(Spacing::Linear(indent)))
+                par.push_front(ParChild::Spacing(Spacing::Relative(indent)))
             }
 
             let node = ParNode(par).pack();
diff --git a/src/eval/layout.rs b/src/eval/layout.rs
index aecc7ef9..f541694c 100644
--- a/src/eval/layout.rs
+++ b/src/eval/layout.rs
@@ -8,7 +8,7 @@ use std::sync::Arc;
 use super::{Barrier, StyleChain};
 use crate::diag::TypResult;
 use crate::frame::{Element, Frame, Geometry, Shape, Stroke};
-use crate::geom::{Align, Length, Linear, Paint, Point, Sides, Size, Spec, Transform};
+use crate::geom::{Align, Length, Paint, Point, Relative, Sides, Size, Spec, Transform};
 use crate::library::graphics::MoveNode;
 use crate::library::layout::{AlignNode, PadNode};
 use crate::util::Prehashed;
@@ -161,7 +161,7 @@ impl LayoutNode {
     }
 
     /// Force a size for this node.
-    pub fn sized(self, sizing: Spec<Option<Linear>>) -> Self {
+    pub fn sized(self, sizing: Spec<Option<Relative>>) -> Self {
         if sizing.any(Option::is_some) {
             SizedNode { sizing, child: self }.pack()
         } else {
@@ -189,7 +189,7 @@ impl LayoutNode {
     }
 
     /// Pad this node at the sides.
-    pub fn padded(self, padding: Sides<Linear>) -> Self {
+    pub fn padded(self, padding: Sides<Relative>) -> Self {
         if !padding.left.is_zero()
             || !padding.top.is_zero()
             || !padding.right.is_zero()
@@ -292,7 +292,7 @@ impl Layout for EmptyNode {
 #[derive(Debug, Hash)]
 struct SizedNode {
     /// How to size the node horizontally and vertically.
-    sizing: Spec<Option<Linear>>,
+    sizing: Spec<Option<Relative>>,
     /// The node to be sized.
     child: LayoutNode,
 }
@@ -314,7 +314,7 @@ impl Layout for SizedNode {
                 .unwrap_or(regions.first);
 
             // Select the appropriate base and expansion for the child depending
-            // on whether it is automatically or linearly sized.
+            // on whether it is automatically or relatively sized.
             let is_auto = self.sizing.map_is_none();
             let base = is_auto.select(regions.base, size);
             let expand = regions.expand | !is_auto;
diff --git a/src/eval/mod.rs b/src/eval/mod.rs
index 564dca20..e83c8159 100644
--- a/src/eval/mod.rs
+++ b/src/eval/mod.rs
@@ -41,7 +41,7 @@ use parking_lot::{MappedRwLockWriteGuard, RwLockWriteGuard};
 use unicode_segmentation::UnicodeSegmentation;
 
 use crate::diag::{At, StrResult, Trace, Tracepoint, TypResult};
-use crate::geom::{Angle, Fractional, Length, Relative};
+use crate::geom::{Angle, Fraction, Length, Ratio};
 use crate::library;
 use crate::syntax::ast::*;
 use crate::syntax::{Span, Spanned};
@@ -245,8 +245,8 @@ impl Eval for Lit {
             LitKind::Float(v) => Value::Float(v),
             LitKind::Length(v, unit) => Value::Length(Length::with_unit(v, unit)),
             LitKind::Angle(v, unit) => Value::Angle(Angle::with_unit(v, unit)),
-            LitKind::Percent(v) => Value::Relative(Relative::new(v / 100.0)),
-            LitKind::Fractional(v) => Value::Fractional(Fractional::new(v)),
+            LitKind::Percent(v) => Value::Ratio(Ratio::new(v / 100.0)),
+            LitKind::Fractional(v) => Value::Fraction(Fraction::new(v)),
             LitKind::Str(ref v) => Value::Str(v.clone()),
         })
     }
diff --git a/src/eval/ops.rs b/src/eval/ops.rs
index 9b46e8f6..024de433 100644
--- a/src/eval/ops.rs
+++ b/src/eval/ops.rs
@@ -34,9 +34,9 @@ pub fn pos(value: Value) -> StrResult<Value> {
         Float(v) => Float(v),
         Length(v) => Length(v),
         Angle(v) => Angle(v),
+        Ratio(v) => Ratio(v),
         Relative(v) => Relative(v),
-        Linear(v) => Linear(v),
-        Fractional(v) => Fractional(v),
+        Fraction(v) => Fraction(v),
         v => mismatch!("cannot apply '+' to {}", v),
     })
 }
@@ -48,9 +48,9 @@ pub fn neg(value: Value) -> StrResult<Value> {
         Float(v) => Float(-v),
         Length(v) => Length(-v),
         Angle(v) => Angle(-v),
+        Ratio(v) => Ratio(-v),
         Relative(v) => Relative(-v),
-        Linear(v) => Linear(-v),
-        Fractional(v) => Fractional(-v),
+        Fraction(v) => Fraction(-v),
         v => mismatch!("cannot apply '-' to {}", v),
     })
 }
@@ -66,18 +66,18 @@ pub fn add(lhs: Value, rhs: Value) -> StrResult<Value> {
         (Angle(a), Angle(b)) => Angle(a + b),
 
         (Length(a), Length(b)) => Length(a + b),
-        (Length(a), Relative(b)) => Linear(a + b),
-        (Length(a), Linear(b)) => Linear(a + b),
+        (Length(a), Ratio(b)) => Relative(a + b),
+        (Length(a), Relative(b)) => Relative(a + b),
 
-        (Relative(a), Length(b)) => Linear(a + b),
-        (Relative(a), Relative(b)) => Relative(a + b),
-        (Relative(a), Linear(b)) => Linear(a + b),
+        (Ratio(a), Length(b)) => Relative(a + b),
+        (Ratio(a), Ratio(b)) => Ratio(a + b),
+        (Ratio(a), Relative(b)) => Relative(a + b),
 
-        (Linear(a), Length(b)) => Linear(a + b),
-        (Linear(a), Relative(b)) => Linear(a + b),
-        (Linear(a), Linear(b)) => Linear(a + b),
+        (Relative(a), Length(b)) => Relative(a + b),
+        (Relative(a), Ratio(b)) => Relative(a + b),
+        (Relative(a), Relative(b)) => Relative(a + b),
 
-        (Fractional(a), Fractional(b)) => Fractional(a + b),
+        (Fraction(a), Fraction(b)) => Fraction(a + b),
 
         (Str(a), Str(b)) => Str(a + b),
 
@@ -123,18 +123,18 @@ pub fn sub(lhs: Value, rhs: Value) -> StrResult<Value> {
         (Angle(a), Angle(b)) => Angle(a - b),
 
         (Length(a), Length(b)) => Length(a - b),
-        (Length(a), Relative(b)) => Linear(a - b),
-        (Length(a), Linear(b)) => Linear(a - b),
+        (Length(a), Ratio(b)) => Relative(a - b),
+        (Length(a), Relative(b)) => Relative(a - b),
 
-        (Relative(a), Length(b)) => Linear(a - b),
-        (Relative(a), Relative(b)) => Relative(a - b),
-        (Relative(a), Linear(b)) => Linear(a - b),
+        (Ratio(a), Length(b)) => Relative(a - b),
+        (Ratio(a), Ratio(b)) => Ratio(a - b),
+        (Ratio(a), Relative(b)) => Relative(a - b),
 
-        (Linear(a), Length(b)) => Linear(a - b),
-        (Linear(a), Relative(b)) => Linear(a - b),
-        (Linear(a), Linear(b)) => Linear(a - b),
+        (Relative(a), Length(b)) => Relative(a - b),
+        (Relative(a), Ratio(b)) => Relative(a - b),
+        (Relative(a), Relative(b)) => Relative(a - b),
 
-        (Fractional(a), Fractional(b)) => Fractional(a - b),
+        (Fraction(a), Fraction(b)) => Fraction(a - b),
 
         (a, b) => mismatch!("cannot subtract {1} from {0}", a, b),
     })
@@ -158,20 +158,20 @@ pub fn mul(lhs: Value, rhs: Value) -> StrResult<Value> {
         (Int(a), Angle(b)) => Angle(a as f64 * b),
         (Float(a), Angle(b)) => Angle(a * b),
 
+        (Ratio(a), Int(b)) => Ratio(a * b as f64),
+        (Ratio(a), Float(b)) => Ratio(a * b),
+        (Float(a), Ratio(b)) => Ratio(a * b),
+        (Int(a), Ratio(b)) => Ratio(a as f64 * b),
+
         (Relative(a), Int(b)) => Relative(a * b as f64),
         (Relative(a), Float(b)) => Relative(a * b),
-        (Float(a), Relative(b)) => Relative(a * b),
         (Int(a), Relative(b)) => Relative(a as f64 * b),
+        (Float(a), Relative(b)) => Relative(a * b),
 
-        (Linear(a), Int(b)) => Linear(a * b as f64),
-        (Linear(a), Float(b)) => Linear(a * b),
-        (Int(a), Linear(b)) => Linear(a as f64 * b),
-        (Float(a), Linear(b)) => Linear(a * b),
-
-        (Float(a), Fractional(b)) => Fractional(a * b),
-        (Fractional(a), Int(b)) => Fractional(a * b as f64),
-        (Fractional(a), Float(b)) => Fractional(a * b),
-        (Int(a), Fractional(b)) => Fractional(a as f64 * b),
+        (Float(a), Fraction(b)) => Fraction(a * b),
+        (Fraction(a), Int(b)) => Fraction(a * b as f64),
+        (Fraction(a), Float(b)) => Fraction(a * b),
+        (Int(a), Fraction(b)) => Fraction(a as f64 * b),
 
         (Str(a), Int(b)) => Str(StrExt::repeat(&a, b)?),
         (Int(a), Str(b)) => Str(StrExt::repeat(&b, a)?),
@@ -200,16 +200,16 @@ pub fn div(lhs: Value, rhs: Value) -> StrResult<Value> {
         (Angle(a), Float(b)) => Angle(a / b),
         (Angle(a), Angle(b)) => Float(a / b),
 
+        (Ratio(a), Int(b)) => Ratio(a / b as f64),
+        (Ratio(a), Float(b)) => Ratio(a / b),
+        (Ratio(a), Ratio(b)) => Float(a / b),
+
         (Relative(a), Int(b)) => Relative(a / b as f64),
         (Relative(a), Float(b)) => Relative(a / b),
-        (Relative(a), Relative(b)) => Float(a / b),
-
-        (Linear(a), Int(b)) => Linear(a / b as f64),
-        (Linear(a), Float(b)) => Linear(a / b),
 
-        (Fractional(a), Int(b)) => Fractional(a / b as f64),
-        (Fractional(a), Float(b)) => Fractional(a / b),
-        (Fractional(a), Fractional(b)) => Float(a / b),
+        (Fraction(a), Int(b)) => Fraction(a / b as f64),
+        (Fraction(a), Float(b)) => Fraction(a / b),
+        (Fraction(a), Fraction(b)) => Float(a / b),
 
         (a, b) => mismatch!("cannot divide {} by {}", a, b),
     })
@@ -278,9 +278,9 @@ pub fn equal(lhs: &Value, rhs: &Value) -> bool {
         (Float(a), Float(b)) => a == b,
         (Length(a), Length(b)) => a == b,
         (Angle(a), Angle(b)) => a == b,
+        (Ratio(a), Ratio(b)) => a == b,
         (Relative(a), Relative(b)) => a == b,
-        (Linear(a), Linear(b)) => a == b,
-        (Fractional(a), Fractional(b)) => a == b,
+        (Fraction(a), Fraction(b)) => a == b,
         (Color(a), Color(b)) => a == b,
         (Str(a), Str(b)) => a == b,
         (Content(a), Content(b)) => a == b,
@@ -292,10 +292,10 @@ pub fn equal(lhs: &Value, rhs: &Value) -> bool {
         // Some technically different things should compare equal.
         (&Int(a), &Float(b)) => a as f64 == b,
         (&Float(a), &Int(b)) => a == b as f64,
-        (&Length(a), &Linear(b)) => a == b.abs && b.rel.is_zero(),
-        (&Relative(a), &Linear(b)) => a == b.rel && b.abs.is_zero(),
-        (&Linear(a), &Length(b)) => a.abs == b && a.rel.is_zero(),
-        (&Linear(a), &Relative(b)) => a.rel == b && a.abs.is_zero(),
+        (&Length(a), &Relative(b)) => a == b.abs && b.rel.is_zero(),
+        (&Ratio(a), &Relative(b)) => a == b.rel && b.abs.is_zero(),
+        (&Relative(a), &Length(b)) => a.abs == b && a.rel.is_zero(),
+        (&Relative(a), &Ratio(b)) => a.rel == b && a.abs.is_zero(),
 
         _ => false,
     }
@@ -309,17 +309,17 @@ pub fn compare(lhs: &Value, rhs: &Value) -> Option<Ordering> {
         (Float(a), Float(b)) => a.partial_cmp(b),
         (Angle(a), Angle(b)) => a.partial_cmp(b),
         (Length(a), Length(b)) => a.partial_cmp(b),
-        (Relative(a), Relative(b)) => a.partial_cmp(b),
-        (Fractional(a), Fractional(b)) => a.partial_cmp(b),
+        (Ratio(a), Ratio(b)) => a.partial_cmp(b),
+        (Fraction(a), Fraction(b)) => a.partial_cmp(b),
         (Str(a), Str(b)) => a.partial_cmp(b),
 
         // Some technically different things should be comparable.
         (&Int(a), &Float(b)) => (a as f64).partial_cmp(&b),
         (&Float(a), &Int(b)) => a.partial_cmp(&(b as f64)),
-        (&Length(a), &Linear(b)) if b.rel.is_zero() => a.partial_cmp(&b.abs),
-        (&Relative(a), &Linear(b)) if b.abs.is_zero() => a.partial_cmp(&b.rel),
-        (&Linear(a), &Length(b)) if a.rel.is_zero() => a.abs.partial_cmp(&b),
-        (&Linear(a), &Relative(b)) if a.abs.is_zero() => a.rel.partial_cmp(&b),
+        (&Length(a), &Relative(b)) if b.rel.is_zero() => a.partial_cmp(&b.abs),
+        (&Ratio(a), &Relative(b)) if b.abs.is_zero() => a.partial_cmp(&b.rel),
+        (&Relative(a), &Length(b)) if a.rel.is_zero() => a.abs.partial_cmp(&b),
+        (&Relative(a), &Ratio(b)) if a.abs.is_zero() => a.rel.partial_cmp(&b),
 
         _ => Option::None,
     }
diff --git a/src/eval/styles.rs b/src/eval/styles.rs
index 8bd21612..b7f1889c 100644
--- a/src/eval/styles.rs
+++ b/src/eval/styles.rs
@@ -270,7 +270,7 @@ pub trait Key<'a>: 'static {
     /// from a style chain. For example, this is [`bool`] for the
     /// [`STRONG`](TextNode::STRONG) property. For non-copy, non-folding
     /// properties this is a reference type.
-    type Output: 'a;
+    type Output;
 
     /// The name of the property, used for debug printing.
     const NAME: &'static str;
diff --git a/src/eval/value.rs b/src/eval/value.rs
index c61c9561..774ae0b6 100644
--- a/src/eval/value.rs
+++ b/src/eval/value.rs
@@ -6,7 +6,7 @@ use std::sync::Arc;
 
 use super::{ops, Args, Array, Content, Context, Dict, Func, Layout, StrExt};
 use crate::diag::{with_alternative, At, StrResult, TypResult};
-use crate::geom::{Angle, Color, Fractional, Length, Linear, Relative, RgbaColor};
+use crate::geom::{Angle, Color, Fraction, Length, Ratio, Relative, RgbaColor};
 use crate::library::text::RawNode;
 use crate::syntax::{Span, Spanned};
 use crate::util::EcoString;
@@ -28,12 +28,12 @@ pub enum Value {
     Length(Length),
     /// An angle: `1.5rad`, `90deg`.
     Angle(Angle),
-    /// A relative value: `50%`.
+    /// A ratio: `50%`.
+    Ratio(Ratio),
+    /// A relative length, combination of a ratio and a length: `20% + 5cm`.
     Relative(Relative),
-    /// A combination of an absolute length and a relative value: `20% + 5cm`.
-    Linear(Linear),
-    /// A fractional value: `1fr`.
-    Fractional(Fractional),
+    /// A fraction: `1fr`.
+    Fraction(Fraction),
     /// A color value: `#f79143ff`.
     Color(Color),
     /// A string: `"string"`.
@@ -79,9 +79,9 @@ impl Value {
             Self::Float(_) => f64::TYPE_NAME,
             Self::Length(_) => Length::TYPE_NAME,
             Self::Angle(_) => Angle::TYPE_NAME,
+            Self::Ratio(_) => Ratio::TYPE_NAME,
             Self::Relative(_) => Relative::TYPE_NAME,
-            Self::Linear(_) => Linear::TYPE_NAME,
-            Self::Fractional(_) => Fractional::TYPE_NAME,
+            Self::Fraction(_) => Fraction::TYPE_NAME,
             Self::Color(_) => Color::TYPE_NAME,
             Self::Str(_) => EcoString::TYPE_NAME,
             Self::Content(_) => Content::TYPE_NAME,
@@ -255,9 +255,9 @@ impl Debug for Value {
             Self::Float(v) => Debug::fmt(v, f),
             Self::Length(v) => Debug::fmt(v, f),
             Self::Angle(v) => Debug::fmt(v, f),
+            Self::Ratio(v) => Debug::fmt(v, f),
             Self::Relative(v) => Debug::fmt(v, f),
-            Self::Linear(v) => Debug::fmt(v, f),
-            Self::Fractional(v) => Debug::fmt(v, f),
+            Self::Fraction(v) => Debug::fmt(v, f),
             Self::Color(v) => Debug::fmt(v, f),
             Self::Str(v) => Debug::fmt(v, f),
             Self::Content(_) => f.pad("<content>"),
@@ -293,9 +293,9 @@ impl Hash for Value {
             Self::Float(v) => v.to_bits().hash(state),
             Self::Length(v) => v.hash(state),
             Self::Angle(v) => v.hash(state),
+            Self::Ratio(v) => v.hash(state),
             Self::Relative(v) => v.hash(state),
-            Self::Linear(v) => v.hash(state),
-            Self::Fractional(v) => v.hash(state),
+            Self::Fraction(v) => v.hash(state),
             Self::Color(v) => v.hash(state),
             Self::Str(v) => v.hash(state),
             Self::Content(v) => v.hash(state),
@@ -548,9 +548,9 @@ primitive! { i64: "integer", Int }
 primitive! { f64: "float", Float, Int(v) => v as f64 }
 primitive! { Length: "length", Length }
 primitive! { Angle: "angle", Angle }
-primitive! { Relative: "relative", Relative }
-primitive! { Linear: "relative length", Linear, Length(v) => v.into(), Relative(v) => v.into() }
-primitive! { Fractional: "fractional length", Fractional }
+primitive! { Ratio: "ratio", Ratio }
+primitive! { Relative: "relative length", Relative, Length(v) => v.into(), Ratio(v) => v.into() }
+primitive! { Fraction: "fraction", Fraction }
 primitive! { Color: "color", Color }
 primitive! { EcoString: "string", Str }
 primitive! { Content: "content", Content, None => Content::new() }
@@ -673,9 +673,9 @@ mod tests {
         test(3.14, "3.14");
         test(Length::pt(5.5), "5.5pt");
         test(Angle::deg(90.0), "90deg");
-        test(Relative::one() / 2.0, "50%");
-        test(Relative::new(0.3) + Length::cm(2.0), "30% + 56.69pt");
-        test(Fractional::one() * 7.55, "7.55fr");
+        test(Ratio::one() / 2.0, "50%");
+        test(Ratio::new(0.3) + Length::cm(2.0), "30% + 56.69pt");
+        test(Fraction::one() * 7.55, "7.55fr");
         test(Color::Rgba(RgbaColor::new(1, 1, 1, 0xff)), "#010101");
 
         // Collections.
diff --git a/src/font.rs b/src/font.rs
index ff00bbef..46d6b8d7 100644
--- a/src/font.rs
+++ b/src/font.rs
@@ -10,7 +10,7 @@ use serde::{Deserialize, Serialize};
 use ttf_parser::{name_id, GlyphId, PlatformId, Tag};
 use unicode_segmentation::UnicodeSegmentation;
 
-use crate::geom::{Em, Length, Linear};
+use crate::geom::{Em, Length, Relative};
 use crate::loading::{FileHash, Loader};
 use crate::util::decode_mac_roman;
 
@@ -379,7 +379,7 @@ impl FaceMetrics {
             VerticalFontMetric::XHeight => self.x_height.resolve(size),
             VerticalFontMetric::Baseline => Length::zero(),
             VerticalFontMetric::Descender => self.descender.resolve(size),
-            VerticalFontMetric::Linear(v) => v.resolve(size),
+            VerticalFontMetric::Relative(v) => v.resolve(size),
         }
     }
 }
@@ -415,7 +415,7 @@ pub enum VerticalFontMetric {
     Descender,
     /// An font-size dependent distance from the baseline (positive goes up, negative
     /// down).
-    Linear(Linear),
+    Relative(Relative),
 }
 
 /// Properties of a single font face.
diff --git a/src/geom/em.rs b/src/geom/em.rs
index d1cf3288..d1e90e04 100644
--- a/src/geom/em.rs
+++ b/src/geom/em.rs
@@ -17,7 +17,7 @@ impl Em {
         Self(Scalar(1.0))
     }
 
-    /// Create an font-relative length.
+    /// Create a font-relative length.
     pub const fn new(em: f64) -> Self {
         Self(Scalar(em))
     }
diff --git a/src/geom/fr.rs b/src/geom/fraction.rs
index 6aa0f5c7..7da85779 100644
--- a/src/geom/fr.rs
+++ b/src/geom/fraction.rs
@@ -1,41 +1,41 @@
 use super::*;
 
-/// A fractional length.
+/// A fraction of remaining space.
 #[derive(Default, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
-pub struct Fractional(Scalar);
+pub struct Fraction(Scalar);
 
-impl Fractional {
+impl Fraction {
     /// Takes up zero space: `0fr`.
     pub const fn zero() -> Self {
         Self(Scalar(0.0))
     }
 
-    /// Takes up as much space as all other items with this fractional size: `1fr`.
+    /// Takes up as much space as all other items with this fraction: `1fr`.
     pub const fn one() -> Self {
         Self(Scalar(1.0))
     }
 
-    /// Create a new fractional value.
+    /// Create a new fraction.
     pub const fn new(ratio: f64) -> Self {
         Self(Scalar(ratio))
     }
 
-    /// Get the underlying ratio.
+    /// Get the underlying number.
     pub const fn get(self) -> f64 {
         (self.0).0
     }
 
-    /// Whether the ratio is zero.
+    /// Whether the fraction is zero.
     pub fn is_zero(self) -> bool {
         self.0 == 0.0
     }
 
-    /// The absolute value of the this fractional.
+    /// The absolute value of the this fraction.
     pub fn abs(self) -> Self {
         Self::new(self.get().abs())
     }
 
-    /// Resolve this fractionals share in the remaining space.
+    /// Resolve this fraction's share in the remaining space.
     pub fn resolve(self, total: Self, remaining: Length) -> Length {
         let ratio = self / total;
         if ratio.is_finite() && remaining.is_finite() {
@@ -46,13 +46,13 @@ impl Fractional {
     }
 }
 
-impl Debug for Fractional {
+impl Debug for Fraction {
     fn fmt(&self, f: &mut Formatter) -> fmt::Result {
         write!(f, "{}fr", round_2(self.get()))
     }
 }
 
-impl Neg for Fractional {
+impl Neg for Fraction {
     type Output = Self;
 
     fn neg(self) -> Self {
@@ -60,7 +60,7 @@ impl Neg for Fractional {
     }
 }
 
-impl Add for Fractional {
+impl Add for Fraction {
     type Output = Self;
 
     fn add(self, other: Self) -> Self {
@@ -68,9 +68,9 @@ impl Add for Fractional {
     }
 }
 
-sub_impl!(Fractional - Fractional -> Fractional);
+sub_impl!(Fraction - Fraction -> Fraction);
 
-impl Mul<f64> for Fractional {
+impl Mul<f64> for Fraction {
     type Output = Self;
 
     fn mul(self, other: f64) -> Self {
@@ -78,15 +78,15 @@ impl Mul<f64> for Fractional {
     }
 }
 
-impl Mul<Fractional> for f64 {
-    type Output = Fractional;
+impl Mul<Fraction> for f64 {
+    type Output = Fraction;
 
-    fn mul(self, other: Fractional) -> Fractional {
+    fn mul(self, other: Fraction) -> Fraction {
         other * self
     }
 }
 
-impl Div<f64> for Fractional {
+impl Div<f64> for Fraction {
     type Output = Self;
 
     fn div(self, other: f64) -> Self {
@@ -94,7 +94,7 @@ impl Div<f64> for Fractional {
     }
 }
 
-impl Div for Fractional {
+impl Div for Fraction {
     type Output = f64;
 
     fn div(self, other: Self) -> f64 {
@@ -102,7 +102,7 @@ impl Div for Fractional {
     }
 }
 
-assign_impl!(Fractional += Fractional);
-assign_impl!(Fractional -= Fractional);
-assign_impl!(Fractional *= f64);
-assign_impl!(Fractional /= f64);
+assign_impl!(Fraction += Fraction);
+assign_impl!(Fraction -= Fraction);
+assign_impl!(Fraction *= f64);
+assign_impl!(Fraction /= f64);
diff --git a/src/geom/linear.rs b/src/geom/linear.rs
deleted file mode 100644
index 78602d8b..00000000
--- a/src/geom/linear.rs
+++ /dev/null
@@ -1,190 +0,0 @@
-use super::*;
-
-/// A combined relative and absolute length.
-#[derive(Default, Copy, Clone, Eq, PartialEq, Hash)]
-pub struct Linear {
-    /// The relative part.
-    pub rel: Relative,
-    /// The absolute part.
-    pub abs: Length,
-}
-
-impl Linear {
-    /// The zero linear.
-    pub const fn zero() -> Self {
-        Self {
-            rel: Relative::zero(),
-            abs: Length::zero(),
-        }
-    }
-
-    /// The linear with a relative part of `100%` and no absolute part.
-    pub const fn one() -> Self {
-        Self {
-            rel: Relative::one(),
-            abs: Length::zero(),
-        }
-    }
-
-    /// Create a new linear.
-    pub const fn new(rel: Relative, abs: Length) -> Self {
-        Self { rel, abs }
-    }
-
-    /// Resolve this linear's relative component to the given `length`.
-    pub fn resolve(self, length: Length) -> Length {
-        self.rel.resolve(length) + self.abs
-    }
-
-    /// Compose with another linear.
-    ///
-    /// The resulting linear is (self ∘ inner)(x) = self(inner(x)).
-    pub fn compose(self, inner: Self) -> Self {
-        Self {
-            rel: self.rel * inner.rel,
-            abs: self.rel.resolve(inner.abs) + self.abs,
-        }
-    }
-
-    /// Whether both parts are zero.
-    pub fn is_zero(self) -> bool {
-        self.rel.is_zero() && self.abs.is_zero()
-    }
-
-    /// Whether there is a linear component.
-    pub fn is_relative(self) -> bool {
-        !self.rel.is_zero()
-    }
-}
-
-impl Debug for Linear {
-    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
-        write!(f, "{:?} + {:?}", self.rel, self.abs)
-    }
-}
-
-impl From<Length> for Linear {
-    fn from(abs: Length) -> Self {
-        Self { rel: Relative::zero(), abs }
-    }
-}
-
-impl From<Relative> for Linear {
-    fn from(rel: Relative) -> Self {
-        Self { rel, abs: Length::zero() }
-    }
-}
-
-impl Neg for Linear {
-    type Output = Self;
-
-    fn neg(self) -> Self {
-        Self { rel: -self.rel, abs: -self.abs }
-    }
-}
-
-impl Add for Linear {
-    type Output = Self;
-
-    fn add(self, other: Self) -> Self {
-        Self {
-            rel: self.rel + other.rel,
-            abs: self.abs + other.abs,
-        }
-    }
-}
-
-impl Add<Relative> for Length {
-    type Output = Linear;
-
-    fn add(self, other: Relative) -> Linear {
-        Linear { rel: other, abs: self }
-    }
-}
-
-impl Add<Length> for Relative {
-    type Output = Linear;
-
-    fn add(self, other: Length) -> Linear {
-        other + self
-    }
-}
-
-impl Add<Length> for Linear {
-    type Output = Self;
-
-    fn add(self, other: Length) -> Self {
-        Self { rel: self.rel, abs: self.abs + other }
-    }
-}
-
-impl Add<Linear> for Length {
-    type Output = Linear;
-
-    fn add(self, other: Linear) -> Linear {
-        other + self
-    }
-}
-
-impl Add<Relative> for Linear {
-    type Output = Self;
-
-    fn add(self, other: Relative) -> Self {
-        Self { rel: self.rel + other, abs: self.abs }
-    }
-}
-
-impl Add<Linear> for Relative {
-    type Output = Linear;
-
-    fn add(self, other: Linear) -> Linear {
-        other + self
-    }
-}
-
-sub_impl!(Linear - Linear -> Linear);
-sub_impl!(Length - Relative -> Linear);
-sub_impl!(Relative - Length -> Linear);
-sub_impl!(Linear - Length -> Linear);
-sub_impl!(Length - Linear -> Linear);
-sub_impl!(Linear - Relative -> Linear);
-sub_impl!(Relative - Linear -> Linear);
-
-impl Mul<f64> for Linear {
-    type Output = Self;
-
-    fn mul(self, other: f64) -> Self {
-        Self {
-            rel: self.rel * other,
-            abs: self.abs * other,
-        }
-    }
-}
-
-impl Mul<Linear> for f64 {
-    type Output = Linear;
-
-    fn mul(self, other: Linear) -> Linear {
-        other * self
-    }
-}
-
-impl Div<f64> for Linear {
-    type Output = Self;
-
-    fn div(self, other: f64) -> Self {
-        Self {
-            rel: self.rel / other,
-            abs: self.abs / other,
-        }
-    }
-}
-
-assign_impl!(Linear += Linear);
-assign_impl!(Linear += Length);
-assign_impl!(Linear += Relative);
-assign_impl!(Linear -= Linear);
-assign_impl!(Linear -= Length);
-assign_impl!(Linear -= Relative);
-assign_impl!(Linear *= f64);
-assign_impl!(Linear /= f64);
diff --git a/src/geom/mod.rs b/src/geom/mod.rs
index 1a48534c..8d7759b4 100644
--- a/src/geom/mod.rs
+++ b/src/geom/mod.rs
@@ -6,13 +6,13 @@ mod align;
 mod angle;
 mod dir;
 mod em;
-mod fr;
+mod fraction;
 mod gen;
 mod length;
-mod linear;
 mod paint;
 mod path;
 mod point;
+mod ratio;
 mod relative;
 mod scalar;
 mod sides;
@@ -23,13 +23,13 @@ pub use align::*;
 pub use angle::*;
 pub use dir::*;
 pub use em::*;
-pub use fr::*;
+pub use fraction::*;
 pub use gen::*;
 pub use length::*;
-pub use linear::*;
 pub use paint::*;
 pub use path::*;
 pub use point::*;
+pub use ratio::*;
 pub use relative::*;
 pub use scalar::*;
 pub use sides::*;
diff --git a/src/geom/ratio.rs b/src/geom/ratio.rs
new file mode 100644
index 00000000..d035c33e
--- /dev/null
+++ b/src/geom/ratio.rs
@@ -0,0 +1,125 @@
+use super::*;
+
+/// A ratio of a whole.
+///
+/// _Note_: `50%` is represented as `0.5` here, but stored as `50.0` in the
+/// corresponding [literal](crate::syntax::ast::LitKind::Percent).
+#[derive(Default, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
+pub struct Ratio(Scalar);
+
+impl Ratio {
+    /// A ratio of `0%` represented as `0.0`.
+    pub const fn zero() -> Self {
+        Self(Scalar(0.0))
+    }
+
+    /// A ratio of `100%` represented as `1.0`.
+    pub const fn one() -> Self {
+        Self(Scalar(1.0))
+    }
+
+    /// Create a new ratio from a value, whre `1.0` means `100%`.
+    pub const fn new(ratio: f64) -> Self {
+        Self(Scalar(ratio))
+    }
+
+    /// Get the underlying ratio.
+    pub const fn get(self) -> f64 {
+        (self.0).0
+    }
+
+    /// Resolve this relative to the given `length`.
+    pub fn resolve(self, length: Length) -> Length {
+        // We don't want NaNs.
+        if length.is_infinite() {
+            Length::zero()
+        } else {
+            self.get() * length
+        }
+    }
+
+    /// Whether the ratio is zero.
+    pub fn is_zero(self) -> bool {
+        self.0 == 0.0
+    }
+
+    /// Whether the ratio is one.
+    pub fn is_one(self) -> bool {
+        self.0 == 1.0
+    }
+
+    /// The absolute value of the this ratio.
+    pub fn abs(self) -> Self {
+        Self::new(self.get().abs())
+    }
+}
+
+impl Debug for Ratio {
+    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
+        write!(f, "{}%", round_2(100.0 * self.get()))
+    }
+}
+
+impl Neg for Ratio {
+    type Output = Self;
+
+    fn neg(self) -> Self {
+        Self(-self.0)
+    }
+}
+
+impl Add for Ratio {
+    type Output = Self;
+
+    fn add(self, other: Self) -> Self {
+        Self(self.0 + other.0)
+    }
+}
+
+sub_impl!(Ratio - Ratio -> Ratio);
+
+impl Mul for Ratio {
+    type Output = Self;
+
+    fn mul(self, other: Self) -> Self {
+        Self(self.0 * other.0)
+    }
+}
+
+impl Mul<f64> for Ratio {
+    type Output = Self;
+
+    fn mul(self, other: f64) -> Self {
+        Self(self.0 * other)
+    }
+}
+
+impl Mul<Ratio> for f64 {
+    type Output = Ratio;
+
+    fn mul(self, other: Ratio) -> Ratio {
+        other * self
+    }
+}
+
+impl Div<f64> for Ratio {
+    type Output = Self;
+
+    fn div(self, other: f64) -> Self {
+        Self(self.0 / other)
+    }
+}
+
+impl Div for Ratio {
+    type Output = f64;
+
+    fn div(self, other: Self) -> f64 {
+        self.get() / other.get()
+    }
+}
+
+assign_impl!(Ratio += Ratio);
+assign_impl!(Ratio -= Ratio);
+assign_impl!(Ratio *= Ratio);
+assign_impl!(Ratio *= f64);
+assign_impl!(Ratio /= f64);
diff --git a/src/geom/relative.rs b/src/geom/relative.rs
index 885de34a..fa2ec7fc 100644
--- a/src/geom/relative.rs
+++ b/src/geom/relative.rs
@@ -1,62 +1,61 @@
 use super::*;
 
 /// A relative length.
-///
-/// _Note_: `50%` is represented as `0.5` here, but stored as `50.0` in the
-/// corresponding [literal](crate::syntax::ast::LitKind::Percent).
-#[derive(Default, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Hash)]
-pub struct Relative(Scalar);
+#[derive(Default, Copy, Clone, Eq, PartialEq, Hash)]
+pub struct Relative {
+    /// The relative part.
+    pub rel: Ratio,
+    /// The absolute part.
+    pub abs: Length,
+}
 
 impl Relative {
-    /// A ratio of `0%` represented as `0.0`.
+    /// The zero relative length.
     pub const fn zero() -> Self {
-        Self(Scalar(0.0))
+        Self { rel: Ratio::zero(), abs: Length::zero() }
     }
 
-    /// A ratio of `100%` represented as `1.0`.
+    /// A relative length with a ratio of `100%` and no absolute part.
     pub const fn one() -> Self {
-        Self(Scalar(1.0))
-    }
-
-    /// Create a new relative value.
-    pub const fn new(ratio: f64) -> Self {
-        Self(Scalar(ratio))
+        Self { rel: Ratio::one(), abs: Length::zero() }
     }
 
-    /// Get the underlying ratio.
-    pub const fn get(self) -> f64 {
-        (self.0).0
+    /// Create a new relative length from its parts.
+    pub const fn new(rel: Ratio, abs: Length) -> Self {
+        Self { rel, abs }
     }
 
-    /// Resolve this relative to the given `length`.
+    /// Resolve this length relative to the given `length`.
     pub fn resolve(self, length: Length) -> Length {
-        // We don't want NaNs.
-        if length.is_infinite() {
-            Length::zero()
-        } else {
-            self.get() * length
-        }
+        self.rel.resolve(length) + self.abs
     }
 
-    /// Whether the ratio is zero.
+    /// Whether both parts are zero.
     pub fn is_zero(self) -> bool {
-        self.0 == 0.0
-    }
-
-    /// Whether the ratio is one.
-    pub fn is_one(self) -> bool {
-        self.0 == 1.0
+        self.rel.is_zero() && self.abs.is_zero()
     }
 
-    /// The absolute value of the this relative.
-    pub fn abs(self) -> Self {
-        Self::new(self.get().abs())
+    /// Whether there is a relative part.
+    pub fn is_relative(self) -> bool {
+        !self.rel.is_zero()
     }
 }
 
 impl Debug for Relative {
     fn fmt(&self, f: &mut Formatter) -> fmt::Result {
-        write!(f, "{}%", round_2(100.0 * self.get()))
+        write!(f, "{:?} + {:?}", self.rel, self.abs)
+    }
+}
+
+impl From<Length> for Relative {
+    fn from(abs: Length) -> Self {
+        Self { rel: Ratio::zero(), abs }
+    }
+}
+
+impl From<Ratio> for Relative {
+    fn from(rel: Ratio) -> Self {
+        Self { rel, abs: Length::zero() }
     }
 }
 
@@ -64,7 +63,7 @@ impl Neg for Relative {
     type Output = Self;
 
     fn neg(self) -> Self {
-        Self(-self.0)
+        Self { rel: -self.rel, abs: -self.abs }
     }
 }
 
@@ -72,25 +71,77 @@ impl Add for Relative {
     type Output = Self;
 
     fn add(self, other: Self) -> Self {
-        Self(self.0 + other.0)
+        Self {
+            rel: self.rel + other.rel,
+            abs: self.abs + other.abs,
+        }
     }
 }
 
-sub_impl!(Relative - Relative -> Relative);
+impl Add<Ratio> for Length {
+    type Output = Relative;
+
+    fn add(self, other: Ratio) -> Relative {
+        Relative { rel: other, abs: self }
+    }
+}
+
+impl Add<Length> for Ratio {
+    type Output = Relative;
+
+    fn add(self, other: Length) -> Relative {
+        other + self
+    }
+}
 
-impl Mul for Relative {
+impl Add<Length> for Relative {
     type Output = Self;
 
-    fn mul(self, other: Self) -> Self {
-        Self(self.0 * other.0)
+    fn add(self, other: Length) -> Self {
+        Self { rel: self.rel, abs: self.abs + other }
     }
 }
 
+impl Add<Relative> for Length {
+    type Output = Relative;
+
+    fn add(self, other: Relative) -> Relative {
+        other + self
+    }
+}
+
+impl Add<Ratio> for Relative {
+    type Output = Self;
+
+    fn add(self, other: Ratio) -> Self {
+        Self { rel: self.rel + other, abs: self.abs }
+    }
+}
+
+impl Add<Relative> for Ratio {
+    type Output = Relative;
+
+    fn add(self, other: Relative) -> Relative {
+        other + self
+    }
+}
+
+sub_impl!(Relative - Relative -> Relative);
+sub_impl!(Length - Ratio -> Relative);
+sub_impl!(Ratio - Length -> Relative);
+sub_impl!(Relative - Length -> Relative);
+sub_impl!(Length - Relative -> Relative);
+sub_impl!(Relative - Ratio -> Relative);
+sub_impl!(Ratio - Relative -> Relative);
+
 impl Mul<f64> for Relative {
     type Output = Self;
 
     fn mul(self, other: f64) -> Self {
-        Self(self.0 * other)
+        Self {
+            rel: self.rel * other,
+            abs: self.abs * other,
+        }
     }
 }
 
@@ -106,20 +157,18 @@ impl Div<f64> for Relative {
     type Output = Self;
 
     fn div(self, other: f64) -> Self {
-        Self(self.0 / other)
-    }
-}
-
-impl Div for Relative {
-    type Output = f64;
-
-    fn div(self, other: Self) -> f64 {
-        self.get() / other.get()
+        Self {
+            rel: self.rel / other,
+            abs: self.abs / other,
+        }
     }
 }
 
 assign_impl!(Relative += Relative);
+assign_impl!(Relative += Length);
+assign_impl!(Relative += Ratio);
 assign_impl!(Relative -= Relative);
-assign_impl!(Relative *= Relative);
+assign_impl!(Relative -= Length);
+assign_impl!(Relative -= Ratio);
 assign_impl!(Relative *= f64);
 assign_impl!(Relative /= f64);
diff --git a/src/geom/sides.rs b/src/geom/sides.rs
index c0929fc7..45420c18 100644
--- a/src/geom/sides.rs
+++ b/src/geom/sides.rs
@@ -43,8 +43,8 @@ where
     }
 }
 
-impl Sides<Linear> {
-    /// Resolve the linear sides relative to the given `size`.
+impl Sides<Relative> {
+    /// Resolve the sides relative to the given `size`.
     pub fn resolve(self, size: Size) -> Sides<Length> {
         Sides {
             left: self.left.resolve(size.x),
diff --git a/src/geom/transform.rs b/src/geom/transform.rs
index 5bc05d84..8d64ebcf 100644
--- a/src/geom/transform.rs
+++ b/src/geom/transform.rs
@@ -3,10 +3,10 @@ use super::*;
 /// A scale-skew-translate transformation.
 #[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
 pub struct Transform {
-    pub sx: Relative,
-    pub ky: Relative,
-    pub kx: Relative,
-    pub sy: Relative,
+    pub sx: Ratio,
+    pub ky: Ratio,
+    pub kx: Ratio,
+    pub sy: Ratio,
     pub tx: Length,
     pub ty: Length,
 }
@@ -15,10 +15,10 @@ impl Transform {
     /// The identity transformation.
     pub const fn identity() -> Self {
         Self {
-            sx: Relative::one(),
-            ky: Relative::zero(),
-            kx: Relative::zero(),
-            sy: Relative::one(),
+            sx: Ratio::one(),
+            ky: Ratio::zero(),
+            kx: Ratio::zero(),
+            sy: Ratio::one(),
             tx: Length::zero(),
             ty: Length::zero(),
         }
@@ -30,14 +30,14 @@ impl Transform {
     }
 
     /// A scaling transform.
-    pub const fn scale(sx: Relative, sy: Relative) -> Self {
+    pub const fn scale(sx: Ratio, sy: Ratio) -> Self {
         Self { sx, sy, ..Self::identity() }
     }
 
     /// A rotation transform.
     pub fn rotation(angle: Angle) -> Self {
-        let cos = Relative::new(angle.cos());
-        let sin = Relative::new(angle.sin());
+        let cos = Ratio::new(angle.cos());
+        let sin = Ratio::new(angle.sin());
         Self {
             sx: cos,
             ky: sin,
diff --git a/src/library/graphics/line.rs b/src/library/graphics/line.rs
index a650c76c..1ca25bd9 100644
--- a/src/library/graphics/line.rs
+++ b/src/library/graphics/line.rs
@@ -3,24 +3,24 @@ use crate::library::prelude::*;
 /// Display a line without affecting the layout.
 #[derive(Debug, Hash)]
 pub struct LineNode {
-    origin: Spec<Linear>,
-    delta: Spec<Linear>,
+    origin: Spec<Relative>,
+    delta: Spec<Relative>,
 }
 
 #[node]
 impl LineNode {
-    /// How the stroke the line.
+    /// How to stroke the line.
     pub const STROKE: Paint = Color::BLACK.into();
     /// The line's thickness.
     pub const THICKNESS: Length = Length::pt(1.0);
 
     fn construct(_: &mut Context, args: &mut Args) -> TypResult<Content> {
-        let origin = args.named::<Spec<Linear>>("origin")?.unwrap_or_default();
-        let delta = match args.named::<Spec<Linear>>("to")? {
+        let origin = args.named::<Spec<Relative>>("origin")?.unwrap_or_default();
+        let delta = match args.named::<Spec<Relative>>("to")? {
             Some(to) => to.zip(origin).map(|(to, from)| to - from),
             None => {
                 let length =
-                    args.named::<Linear>("length")?.unwrap_or(Length::cm(1.0).into());
+                    args.named::<Relative>("length")?.unwrap_or(Length::cm(1.0).into());
                 let angle = args.named::<Angle>("angle")?.unwrap_or_default();
 
                 let x = angle.cos() * length;
@@ -48,9 +48,9 @@ impl Layout for LineNode {
         });
 
         let resolved_origin =
-            self.origin.zip(regions.base).map(|(l, b)| Linear::resolve(l, b));
+            self.origin.zip(regions.base).map(|(l, b)| Relative::resolve(l, b));
         let resolved_delta =
-            self.delta.zip(regions.base).map(|(l, b)| Linear::resolve(l, b));
+            self.delta.zip(regions.base).map(|(l, b)| Relative::resolve(l, b));
 
         let geometry = Geometry::Line(resolved_delta.to_point());
         let shape = Shape { geometry, fill: None, stroke };
diff --git a/src/library/graphics/shape.rs b/src/library/graphics/shape.rs
index 177f466e..3f338d1a 100644
--- a/src/library/graphics/shape.rs
+++ b/src/library/graphics/shape.rs
@@ -23,17 +23,17 @@ pub type EllipseNode = ShapeNode<ELLIPSE>;
 impl<const S: ShapeKind> ShapeNode<S> {
     /// How to fill the shape.
     pub const FILL: Option<Paint> = None;
-    /// How the stroke the shape.
+    /// How to stroke the shape.
     pub const STROKE: Smart<Option<Paint>> = Smart::Auto;
     /// The stroke's thickness.
     pub const THICKNESS: Length = Length::pt(1.0);
     /// How much to pad the shape's content.
-    pub const PADDING: Linear = Linear::zero();
+    pub const PADDING: Relative = Relative::zero();
 
     fn construct(_: &mut Context, args: &mut Args) -> TypResult<Content> {
         let size = match S {
-            SQUARE => args.named::<Length>("size")?.map(Linear::from),
-            CIRCLE => args.named::<Length>("radius")?.map(|r| 2.0 * Linear::from(r)),
+            SQUARE => args.named::<Length>("size")?.map(Relative::from),
+            CIRCLE => args.named::<Length>("radius")?.map(|r| 2.0 * Relative::from(r)),
             _ => None,
         };
 
@@ -64,7 +64,7 @@ impl<const S: ShapeKind> Layout for ShapeNode<S> {
         if let Some(child) = &self.0 {
             let mut padding = styles.get(Self::PADDING);
             if is_round(S) {
-                padding.rel += Relative::new(0.5 - SQRT_2 / 4.0);
+                padding.rel += Ratio::new(0.5 - SQRT_2 / 4.0);
             }
 
             // Pad the child.
diff --git a/src/library/graphics/transform.rs b/src/library/graphics/transform.rs
index 0dc50166..1ce91f28 100644
--- a/src/library/graphics/transform.rs
+++ b/src/library/graphics/transform.rs
@@ -37,8 +37,8 @@ impl<const T: TransformKind> TransformNode<T> {
             }
             SCALE | _ => {
                 let all = args.find()?;
-                let sx = args.named("x")?.or(all).unwrap_or(Relative::one());
-                let sy = args.named("y")?.or(all).unwrap_or(Relative::one());
+                let sx = args.named("x")?.or(all).unwrap_or(Ratio::one());
+                let sy = args.named("y")?.or(all).unwrap_or(Ratio::one());
                 Transform::scale(sx, sy)
             }
         };
diff --git a/src/library/layout/columns.rs b/src/library/layout/columns.rs
index b5ec7de9..56e55d57 100644
--- a/src/library/layout/columns.rs
+++ b/src/library/layout/columns.rs
@@ -14,7 +14,7 @@ pub struct ColumnsNode {
 #[node]
 impl ColumnsNode {
     /// The size of the gutter space between each column.
-    pub const GUTTER: Linear = Relative::new(0.04).into();
+    pub const GUTTER: Relative = Ratio::new(0.04).into();
 
     fn construct(_: &mut Context, args: &mut Args) -> TypResult<Content> {
         Ok(Content::block(Self {
diff --git a/src/library/layout/flow.rs b/src/library/layout/flow.rs
index 9f398277..ffda6925 100644
--- a/src/library/layout/flow.rs
+++ b/src/library/layout/flow.rs
@@ -100,8 +100,8 @@ pub struct FlowLayouter {
     full: Size,
     /// The size used by the frames for the current region.
     used: Size,
-    /// The sum of fractional ratios in the current region.
-    fr: Fractional,
+    /// The sum of fractions in the current region.
+    fr: Fraction,
     /// Spacing and layouted nodes.
     items: Vec<FlowItem>,
     /// Finished frames for previous regions.
@@ -113,7 +113,7 @@ enum FlowItem {
     /// Absolute spacing between other items.
     Absolute(Length),
     /// Fractional spacing between other items.
-    Fractional(Fractional),
+    Fractional(Fraction),
     /// A frame for a layouted child node and how to align it.
     Frame(Arc<Frame>, Spec<Align>),
     /// An absolutely placed frame.
@@ -135,7 +135,7 @@ impl FlowLayouter {
             expand,
             full,
             used: Size::zero(),
-            fr: Fractional::zero(),
+            fr: Fraction::zero(),
             items: vec![],
             finished: vec![],
         }
@@ -144,8 +144,8 @@ impl FlowLayouter {
     /// Layout spacing.
     pub fn layout_spacing(&mut self, spacing: Spacing) {
         match spacing {
-            Spacing::Linear(v) => {
-                // Resolve the linear and limit it to the remaining space.
+            Spacing::Relative(v) => {
+                // Resolve the spacing and limit it to the remaining space.
                 let resolved = v.resolve(self.full.y);
                 let limited = resolved.min(self.regions.first.y);
                 self.regions.first.y -= limited;
@@ -254,7 +254,7 @@ impl FlowLayouter {
         self.regions.next();
         self.full = self.regions.first;
         self.used = Size::zero();
-        self.fr = Fractional::zero();
+        self.fr = Fraction::zero();
         self.finished.push(Arc::new(output));
     }
 
diff --git a/src/library/layout/grid.rs b/src/library/layout/grid.rs
index 716ac853..ee485bd2 100644
--- a/src/library/layout/grid.rs
+++ b/src/library/layout/grid.rs
@@ -54,22 +54,24 @@ impl Layout for GridNode {
 /// Defines how to size a grid cell along an axis.
 #[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
 pub enum TrackSizing {
-    /// Fit the cell to its contents.
+    /// A track that fits its cell's contents.
     Auto,
-    /// A length stated in absolute values and/or relative to the parent's size.
-    Linear(Linear),
-    /// A length that is the fraction of the remaining free space in the parent.
-    Fractional(Fractional),
+    /// A track size specified in absolute terms and relative to the parent's
+    /// size.
+    Relative(Relative),
+    /// A track size specified as a fraction of the remaining free space in the
+    /// parent.
+    Fractional(Fraction),
 }
 
 castable! {
     Vec<TrackSizing>,
-    Expected: "integer or (auto, linear, fractional, or array thereof)",
+    Expected: "integer, auto, relative length, fraction, or array of the latter three)",
     Value::Auto => vec![TrackSizing::Auto],
-    Value::Length(v) => vec![TrackSizing::Linear(v.into())],
-    Value::Relative(v) => vec![TrackSizing::Linear(v.into())],
-    Value::Linear(v) => vec![TrackSizing::Linear(v)],
-    Value::Fractional(v) => vec![TrackSizing::Fractional(v)],
+    Value::Length(v) => vec![TrackSizing::Relative(v.into())],
+    Value::Ratio(v) => vec![TrackSizing::Relative(v.into())],
+    Value::Relative(v) => vec![TrackSizing::Relative(v)],
+    Value::Fraction(v) => vec![TrackSizing::Fractional(v)],
     Value::Int(v) => vec![TrackSizing::Auto; Value::Int(v).cast::<NonZeroUsize>()?.get()],
     Value::Array(values) => values
         .into_iter()
@@ -79,12 +81,12 @@ castable! {
 
 castable! {
     TrackSizing,
-    Expected: "auto, linear, or fractional",
+    Expected: "auto, relative length, or fraction",
     Value::Auto => Self::Auto,
-    Value::Length(v) => Self::Linear(v.into()),
-    Value::Relative(v) => Self::Linear(v.into()),
-    Value::Linear(v) => Self::Linear(v),
-    Value::Fractional(v) => Self::Fractional(v),
+    Value::Length(v) => Self::Relative(v.into()),
+    Value::Ratio(v) => Self::Relative(v.into()),
+    Value::Relative(v) => Self::Relative(v),
+    Value::Fraction(v) => Self::Fractional(v),
 }
 
 /// Performs grid layout.
@@ -108,19 +110,19 @@ pub struct GridLayouter<'a> {
     /// The used-up size of the current region. The horizontal size is
     /// determined once after columns are resolved and not touched again.
     used: Size,
-    /// The sum of fractional ratios in the current region.
-    fr: Fractional,
+    /// The sum of fractions in the current region.
+    fr: Fraction,
     /// Frames for finished regions.
     finished: Vec<Arc<Frame>>,
 }
 
-/// Produced by initial row layout, auto and linear rows are already finished,
+/// Produced by initial row layout, auto and relative rows are already finished,
 /// fractional rows not yet.
 enum Row {
-    /// Finished row frame of auto or linear row.
+    /// Finished row frame of auto or relative row.
     Frame(Frame),
-    /// Ratio of a fractional row and y index of the track.
-    Fr(Fractional, usize),
+    /// Fractional row with y index.
+    Fr(Fraction, usize),
 }
 
 impl<'a> GridLayouter<'a> {
@@ -150,7 +152,7 @@ impl<'a> GridLayouter<'a> {
         };
 
         let auto = TrackSizing::Auto;
-        let zero = TrackSizing::Linear(Linear::zero());
+        let zero = TrackSizing::Relative(Relative::zero());
         let get_or = |tracks: &[_], idx, default| {
             tracks.get(idx).or(tracks.last()).copied().unwrap_or(default)
         };
@@ -190,7 +192,7 @@ impl<'a> GridLayouter<'a> {
             lrows,
             full,
             used: Size::zero(),
-            fr: Fractional::zero(),
+            fr: Fraction::zero(),
             finished: vec![],
         }
     }
@@ -208,7 +210,7 @@ impl<'a> GridLayouter<'a> {
 
             match self.rows[y] {
                 TrackSizing::Auto => self.layout_auto_row(ctx, y)?,
-                TrackSizing::Linear(v) => self.layout_linear_row(ctx, v, y)?,
+                TrackSizing::Relative(v) => self.layout_relative_row(ctx, v, y)?,
                 TrackSizing::Fractional(v) => {
                     self.lrows.push(Row::Fr(v, y));
                     self.fr += v;
@@ -222,28 +224,28 @@ impl<'a> GridLayouter<'a> {
 
     /// Determine all column sizes.
     fn measure_columns(&mut self, ctx: &mut Context) -> TypResult<()> {
-        // Sum of sizes of resolved linear tracks.
-        let mut linear = Length::zero();
+        // Sum of sizes of resolved relative tracks.
+        let mut rel = Length::zero();
 
         // Sum of fractions of all fractional tracks.
-        let mut fr = Fractional::zero();
+        let mut fr = Fraction::zero();
 
-        // Resolve the size of all linear columns and compute the sum of all
+        // Resolve the size of all relative columns and compute the sum of all
         // fractional tracks.
         for (&col, rcol) in self.cols.iter().zip(&mut self.rcols) {
             match col {
                 TrackSizing::Auto => {}
-                TrackSizing::Linear(v) => {
+                TrackSizing::Relative(v) => {
                     let resolved = v.resolve(self.regions.base.x);
                     *rcol = resolved;
-                    linear += resolved;
+                    rel += resolved;
                 }
                 TrackSizing::Fractional(v) => fr += v,
             }
         }
 
         // Size that is not used by fixed-size columns.
-        let available = self.regions.first.x - linear;
+        let available = self.regions.first.x - rel;
         if available >= Length::zero() {
             // Determine size of auto columns.
             let (auto, count) = self.measure_auto_columns(ctx, available)?;
@@ -289,10 +291,10 @@ impl<'a> GridLayouter<'a> {
                     let mut pod =
                         Regions::one(size, self.regions.base, Spec::splat(false));
 
-                    // For linear rows, we can already resolve the correct
+                    // For relative rows, we can already resolve the correct
                     // base, for auto it's already correct and for fr we could
                     // only guess anyway.
-                    if let TrackSizing::Linear(v) = self.rows[y] {
+                    if let TrackSizing::Relative(v) = self.rows[y] {
                         pod.base.y = v.resolve(self.regions.base.y);
                     }
 
@@ -310,7 +312,7 @@ impl<'a> GridLayouter<'a> {
     }
 
     /// Distribute remaining space to fractional columns.
-    fn grow_fractional_columns(&mut self, remaining: Length, fr: Fractional) {
+    fn grow_fractional_columns(&mut self, remaining: Length, fr: Fraction) {
         for (&col, rcol) in self.cols.iter().zip(&mut self.rcols) {
             if let TrackSizing::Fractional(v) = col {
                 *rcol = v.resolve(fr, remaining);
@@ -415,12 +417,12 @@ impl<'a> GridLayouter<'a> {
         Ok(())
     }
 
-    /// Layout a row with linear height. Such a row cannot break across multiple
-    /// regions, but it may force a region break.
-    fn layout_linear_row(
+    /// Layout a row with relative height. Such a row cannot break across
+    /// multiple regions, but it may force a region break.
+    fn layout_relative_row(
         &mut self,
         ctx: &mut Context,
-        v: Linear,
+        v: Relative,
         y: usize,
     ) -> TypResult<()> {
         let resolved = v.resolve(self.regions.base.y);
@@ -457,7 +459,7 @@ impl<'a> GridLayouter<'a> {
                 let size = Size::new(rcol, height);
 
                 // Set the base to the region's base for auto rows and to the
-                // size for linear and fractional rows.
+                // size for relative and fractional rows.
                 let base = Spec::new(self.cols[x], self.rows[y])
                     .map(|s| s == TrackSizing::Auto)
                     .select(self.regions.base, size);
@@ -555,7 +557,7 @@ impl<'a> GridLayouter<'a> {
         self.regions.next();
         self.full = self.regions.first.y;
         self.used.y = Length::zero();
-        self.fr = Fractional::zero();
+        self.fr = Fraction::zero();
 
         Ok(())
     }
diff --git a/src/library/layout/pad.rs b/src/library/layout/pad.rs
index 664c63ac..1ec5f124 100644
--- a/src/library/layout/pad.rs
+++ b/src/library/layout/pad.rs
@@ -4,7 +4,7 @@ use crate::library::prelude::*;
 #[derive(Debug, Hash)]
 pub struct PadNode {
     /// The amount of padding.
-    pub padding: Sides<Linear>,
+    pub padding: Sides<Relative>,
     /// The child node whose sides to pad.
     pub child: LayoutNode,
 }
@@ -54,7 +54,7 @@ impl Layout for PadNode {
 }
 
 /// Shrink a size by padding relative to the size itself.
-fn shrink(size: Size, padding: Sides<Linear>) -> Size {
+fn shrink(size: Size, padding: Sides<Relative>) -> Size {
     size - padding.resolve(size).sum_by_axis()
 }
 
@@ -77,7 +77,7 @@ fn shrink(size: Size, padding: Sides<Linear>) -> Size {
 ///   <=> w - p.rel * w - p.abs = s
 ///   <=> (1 - p.rel) * w = s + p.abs
 ///   <=> w = (s + p.abs) / (1 - p.rel)
-fn grow(size: Size, padding: Sides<Linear>) -> Size {
+fn grow(size: Size, padding: Sides<Relative>) -> Size {
     size.zip(padding.sum_by_axis())
         .map(|(s, p)| (s + p.abs).safe_div(1.0 - p.rel.get()))
 }
diff --git a/src/library/layout/page.rs b/src/library/layout/page.rs
index c8af4843..abe1786f 100644
--- a/src/library/layout/page.rs
+++ b/src/library/layout/page.rs
@@ -16,13 +16,13 @@ impl PageNode {
     /// Whether the page is flipped into landscape orientation.
     pub const FLIPPED: bool = false;
     /// The left margin.
-    pub const LEFT: Smart<Linear> = Smart::Auto;
+    pub const LEFT: Smart<Relative> = Smart::Auto;
     /// The right margin.
-    pub const RIGHT: Smart<Linear> = Smart::Auto;
+    pub const RIGHT: Smart<Relative> = Smart::Auto;
     /// The top margin.
-    pub const TOP: Smart<Linear> = Smart::Auto;
+    pub const TOP: Smart<Relative> = Smart::Auto;
     /// The bottom margin.
-    pub const BOTTOM: Smart<Linear> = Smart::Auto;
+    pub const BOTTOM: Smart<Relative> = Smart::Auto;
     /// The page's background color.
     pub const FILL: Option<Paint> = None;
     /// How many columns the page has.
@@ -90,7 +90,7 @@ impl PageNode {
         }
 
         // Determine the margins.
-        let default = Linear::from(0.1190 * min);
+        let default = Relative::from(0.1190 * min);
         let padding = Sides {
             left: styles.get(Self::LEFT).unwrap_or(default),
             right: styles.get(Self::RIGHT).unwrap_or(default),
diff --git a/src/library/layout/spacing.rs b/src/library/layout/spacing.rs
index 8aea780c..633093e9 100644
--- a/src/library/layout/spacing.rs
+++ b/src/library/layout/spacing.rs
@@ -23,10 +23,10 @@ impl VNode {
 /// Kinds of spacing.
 #[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
 pub enum Spacing {
-    /// A length stated in absolute values and/or relative to the parent's size.
-    Linear(Linear),
-    /// A length that is the fraction of the remaining free space in the parent.
-    Fractional(Fractional),
+    /// Spacing specified in absolute terms and relative to the parent's size.
+    Relative(Relative),
+    /// Spacing specified as a fraction of the remaining free space in the parent.
+    Fractional(Fraction),
 }
 
 impl Spacing {
@@ -38,15 +38,15 @@ impl Spacing {
 
 impl From<Length> for Spacing {
     fn from(length: Length) -> Self {
-        Self::Linear(length.into())
+        Self::Relative(length.into())
     }
 }
 
 castable! {
     Spacing,
-    Expected: "linear or fractional",
-    Value::Length(v) => Self::Linear(v.into()),
-    Value::Relative(v) => Self::Linear(v.into()),
-    Value::Linear(v) => Self::Linear(v),
-    Value::Fractional(v) => Self::Fractional(v),
+    Expected: "relative length or fraction",
+    Value::Length(v) => Self::Relative(v.into()),
+    Value::Ratio(v) => Self::Relative(v.into()),
+    Value::Relative(v) => Self::Relative(v),
+    Value::Fraction(v) => Self::Fractional(v),
 }
diff --git a/src/library/layout/stack.rs b/src/library/layout/stack.rs
index 11d45bb4..b0e2e160 100644
--- a/src/library/layout/stack.rs
+++ b/src/library/layout/stack.rs
@@ -76,11 +76,11 @@ impl Debug for StackChild {
 
 castable! {
     StackChild,
-    Expected: "linear, fractional or content",
-    Value::Length(v) => Self::Spacing(Spacing::Linear(v.into())),
-    Value::Relative(v) => Self::Spacing(Spacing::Linear(v.into())),
-    Value::Linear(v) => Self::Spacing(Spacing::Linear(v)),
-    Value::Fractional(v) => Self::Spacing(Spacing::Fractional(v)),
+    Expected: "relative length, fraction, or content",
+    Value::Length(v) => Self::Spacing(Spacing::Relative(v.into())),
+    Value::Ratio(v) => Self::Spacing(Spacing::Relative(v.into())),
+    Value::Relative(v) => Self::Spacing(Spacing::Relative(v)),
+    Value::Fraction(v) => Self::Spacing(Spacing::Fractional(v)),
     Value::Content(v) => Self::Node(v.pack()),
 }
 
@@ -98,8 +98,8 @@ pub struct StackLayouter {
     full: Size,
     /// The generic size used by the frames for the current region.
     used: Gen<Length>,
-    /// The sum of fractional ratios in the current region.
-    fr: Fractional,
+    /// The sum of fractions in the current region.
+    fr: Fraction,
     /// Already layouted items whose exact positions are not yet known due to
     /// fractional spacing.
     items: Vec<StackItem>,
@@ -112,7 +112,7 @@ enum StackItem {
     /// Absolute spacing between other items.
     Absolute(Length),
     /// Fractional spacing between other items.
-    Fractional(Fractional),
+    Fractional(Fraction),
     /// A frame for a layouted child node.
     Frame(Arc<Frame>, Align),
 }
@@ -135,7 +135,7 @@ impl StackLayouter {
             expand,
             full,
             used: Gen::zero(),
-            fr: Fractional::zero(),
+            fr: Fraction::zero(),
             items: vec![],
             finished: vec![],
         }
@@ -144,8 +144,8 @@ impl StackLayouter {
     /// Add spacing along the spacing direction.
     pub fn layout_spacing(&mut self, spacing: Spacing) {
         match spacing {
-            Spacing::Linear(v) => {
-                // Resolve the linear and limit it to the remaining space.
+            Spacing::Relative(v) => {
+                // Resolve the spacing and limit it to the remaining space.
                 let resolved = v.resolve(self.regions.base.get(self.axis));
                 let remaining = self.regions.first.get_mut(self.axis);
                 let limited = resolved.min(*remaining);
@@ -247,7 +247,7 @@ impl StackLayouter {
         self.regions.next();
         self.full = self.regions.first;
         self.used = Gen::zero();
-        self.fr = Fractional::zero();
+        self.fr = Fraction::zero();
         self.finished.push(Arc::new(output));
     }
 
diff --git a/src/library/mod.rs b/src/library/mod.rs
index bba002de..af9ab575 100644
--- a/src/library/mod.rs
+++ b/src/library/mod.rs
@@ -167,13 +167,13 @@ castable! {
 }
 
 castable! {
-    Spec<Linear>,
-    Expected: "array of exactly two linears",
+    Spec<Relative>,
+    Expected: "array of two relative lengths",
     Value::Array(array) => {
         match array.as_slice() {
             [a, b] => {
-                let a = a.clone().cast::<Linear>()?;
-                let b = b.clone().cast::<Linear>()?;
+                let a = a.clone().cast::<Relative>()?;
+                let b = b.clone().cast::<Relative>()?;
                 Spec::new(a, b)
             },
             _ => return Err("point array must contain exactly two entries".to_string()),
diff --git a/src/library/structure/heading.rs b/src/library/structure/heading.rs
index 7b00c643..8b143865 100644
--- a/src/library/structure/heading.rs
+++ b/src/library/structure/heading.rs
@@ -23,7 +23,7 @@ impl HeadingNode {
     #[property(referenced)]
     pub const SIZE: Leveled<FontSize> = Leveled::Mapping(|level| {
         let upscale = (1.6 - 0.1 * level as f64).max(0.75);
-        FontSize(Relative::new(upscale).into())
+        FontSize(Ratio::new(upscale).into())
     });
     /// Whether text in the heading is strengthend.
     #[property(referenced)]
diff --git a/src/library/structure/list.rs b/src/library/structure/list.rs
index 1b22e166..532ec625 100644
--- a/src/library/structure/list.rs
+++ b/src/library/structure/list.rs
@@ -34,11 +34,11 @@ impl<const L: ListKind> ListNode<L> {
     #[property(referenced)]
     pub const LABEL: Label = Label::Default;
     /// The spacing between the list items of a non-wide list.
-    pub const SPACING: Linear = Linear::zero();
+    pub const SPACING: Relative = Relative::zero();
     /// The indentation of each item's label.
-    pub const INDENT: Linear = Relative::new(0.0).into();
+    pub const INDENT: Relative = Ratio::new(0.0).into();
     /// The space between the label and the body of each item.
-    pub const BODY_INDENT: Linear = Relative::new(0.5).into();
+    pub const BODY_INDENT: Relative = Ratio::new(0.5).into();
     /// The extra padding above the list.
     pub const ABOVE: Length = Length::zero();
     /// The extra padding below the list.
@@ -91,12 +91,12 @@ impl<const L: ListKind> Show for ListNode<L> {
 
             Content::block(GridNode {
                 tracks: Spec::with_x(vec![
-                    TrackSizing::Linear(indent.into()),
+                    TrackSizing::Relative(indent.into()),
                     TrackSizing::Auto,
-                    TrackSizing::Linear(body_indent.into()),
+                    TrackSizing::Relative(body_indent.into()),
                     TrackSizing::Auto,
                 ]),
-                gutter: Spec::with_y(vec![TrackSizing::Linear(gutter.into())]),
+                gutter: Spec::with_y(vec![TrackSizing::Relative(gutter.into())]),
                 children,
             })
         };
diff --git a/src/library/structure/table.rs b/src/library/structure/table.rs
index 64785006..9317e43f 100644
--- a/src/library/structure/table.rs
+++ b/src/library/structure/table.rs
@@ -18,12 +18,12 @@ impl TableNode {
     pub const PRIMARY: Option<Paint> = None;
     /// The secondary cell fill color.
     pub const SECONDARY: Option<Paint> = None;
-    /// How the stroke the cells.
+    /// How to stroke the cells.
     pub const STROKE: Option<Paint> = Some(Color::BLACK.into());
     /// The stroke's thickness.
     pub const THICKNESS: Length = Length::pt(1.0);
     /// How much to pad the cells's content.
-    pub const PADDING: Linear = Length::pt(5.0).into();
+    pub const PADDING: Relative = Length::pt(5.0).into();
 
     fn construct(_: &mut Context, args: &mut Args) -> TypResult<Content> {
         let columns = args.named("columns")?.unwrap_or_default();
diff --git a/src/library/text/deco.rs b/src/library/text/deco.rs
index a6375e4e..a81f0374 100644
--- a/src/library/text/deco.rs
+++ b/src/library/text/deco.rs
@@ -26,13 +26,13 @@ impl<const L: DecoLine> DecoNode<L> {
     /// Thickness of the line's strokes (dependent on scaled font size), read
     /// from the font tables if `None`.
     #[property(shorthand)]
-    pub const THICKNESS: Option<Linear> = None;
+    pub const THICKNESS: Option<Relative> = None;
     /// Position of the line relative to the baseline (dependent on scaled font
     /// size), read from the font tables if `None`.
-    pub const OFFSET: Option<Linear> = None;
+    pub const OFFSET: Option<Relative> = None;
     /// Amount that the line will be longer or shorter than its associated text
     /// (dependent on scaled font size).
-    pub const EXTENT: Linear = Linear::zero();
+    pub const EXTENT: Relative = Relative::zero();
     /// Whether the line skips sections in which it would collide
     /// with the glyphs. Does not apply to strikethrough.
     pub const EVADE: bool = true;
@@ -66,9 +66,9 @@ impl<const L: DecoLine> Show for DecoNode<L> {
 pub struct Decoration {
     pub line: DecoLine,
     pub stroke: Option<Paint>,
-    pub thickness: Option<Linear>,
-    pub offset: Option<Linear>,
-    pub extent: Linear,
+    pub thickness: Option<Relative>,
+    pub offset: Option<Relative>,
+    pub extent: Relative,
     pub evade: bool,
 }
 
diff --git a/src/library/text/mod.rs b/src/library/text/mod.rs
index 64994136..975a4805 100644
--- a/src/library/text/mod.rs
+++ b/src/library/text/mod.rs
@@ -49,7 +49,7 @@ impl TextNode {
     /// The amount of space that should be added between characters.
     pub const TRACKING: Em = Em::zero();
     /// The ratio by which spaces should be stretched.
-    pub const SPACING: Relative = Relative::one();
+    pub const SPACING: Ratio = Ratio::one();
     /// Whether glyphs can hang over into the margin.
     pub const OVERHANG: bool = true;
     /// The top end of the text bounding box.
@@ -182,13 +182,13 @@ castable! {
 
 castable! {
     FontStretch,
-    Expected: "relative",
-    Value::Relative(v) => Self::from_ratio(v.get() as f32),
+    Expected: "ratio",
+    Value::Ratio(v) => Self::from_ratio(v.get() as f32),
 }
 
 /// The size of text.
 #[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
-pub struct FontSize(pub Linear);
+pub struct FontSize(pub Relative);
 
 impl Fold for FontSize {
     type Output = Length;
@@ -200,10 +200,10 @@ impl Fold for FontSize {
 
 castable! {
     FontSize,
-    Expected: "linear",
+    Expected: "relative length",
     Value::Length(v) => Self(v.into()),
-    Value::Relative(v) => Self(v.into()),
-    Value::Linear(v) => Self(v),
+    Value::Ratio(v) => Self(v.into()),
+    Value::Relative(v) => Self(v),
 }
 
 castable! {
@@ -214,10 +214,10 @@ castable! {
 
 castable! {
     VerticalFontMetric,
-    Expected: "linear or string",
-    Value::Length(v) => Self::Linear(v.into()),
-    Value::Relative(v) => Self::Linear(v.into()),
-    Value::Linear(v) => Self::Linear(v),
+    Expected: "string or relative length",
+    Value::Length(v) => Self::Relative(v.into()),
+    Value::Ratio(v) => Self::Relative(v.into()),
+    Value::Relative(v) => Self::Relative(v),
     Value::Str(string) => match string.as_str() {
         "ascender" => Self::Ascender,
         "cap-height" => Self::CapHeight,
diff --git a/src/library/text/par.rs b/src/library/text/par.rs
index 1695e010..a05aff44 100644
--- a/src/library/text/par.rs
+++ b/src/library/text/par.rs
@@ -42,11 +42,11 @@ impl ParNode {
     /// will will be hyphenated if and only if justification is enabled.
     pub const HYPHENATE: Smart<bool> = Smart::Auto;
     /// The spacing between lines (dependent on scaled font size).
-    pub const LEADING: Linear = Relative::new(0.65).into();
+    pub const LEADING: Relative = Ratio::new(0.65).into();
     /// The extra spacing between paragraphs (dependent on scaled font size).
-    pub const SPACING: Linear = Relative::new(0.55).into();
+    pub const SPACING: Relative = Ratio::new(0.55).into();
     /// The indent the first line of a consecutive paragraph should have.
-    pub const INDENT: Linear = Linear::zero();
+    pub const INDENT: Relative = Relative::zero();
 
     fn construct(_: &mut Context, args: &mut Args) -> TypResult<Content> {
         // The paragraph constructor is special: It doesn't create a paragraph
@@ -249,7 +249,7 @@ enum ParItem<'a> {
     /// Absolute spacing between other items.
     Absolute(Length),
     /// Fractional spacing between other items.
-    Fractional(Fractional),
+    Fractional(Fraction),
     /// A shaped text run with consistent direction.
     Text(ShapedText<'a>),
     /// A layouted child node.
@@ -285,8 +285,8 @@ struct Line<'a> {
     size: Size,
     /// The baseline of the line.
     baseline: Length,
-    /// The sum of fractional ratios in the line.
-    fr: Fractional,
+    /// The sum of fractions in the line.
+    fr: Fraction,
     /// Whether the line ends at a mandatory break.
     mandatory: bool,
     /// Whether the line ends with a hyphen or dash, either naturally or through
@@ -370,7 +370,7 @@ fn prepare<'a>(
                 }
             }
             ParChild::Spacing(spacing) => match *spacing {
-                Spacing::Linear(v) => {
+                Spacing::Relative(v) => {
                     let resolved = v.resolve(regions.base.x);
                     items.push(ParItem::Absolute(resolved));
                     ranges.push(range);
@@ -731,7 +731,7 @@ fn line<'a>(
     let mut width = Length::zero();
     let mut top = Length::zero();
     let mut bottom = Length::zero();
-    let mut fr = Fractional::zero();
+    let mut fr = Fraction::zero();
 
     // Measure the size of the line.
     for item in first.iter().chain(items).chain(&last) {
diff --git a/src/library/utility/color.rs b/src/library/utility/color.rs
index df24f615..409af177 100644
--- a/src/library/utility/color.rs
+++ b/src/library/utility/color.rs
@@ -15,12 +15,12 @@ pub fn rgb(_: &mut Context, args: &mut Args) -> TypResult<Value> {
 
             castable! {
                 Component,
-                Expected: "integer or relative",
+                Expected: "integer or ratio",
                 Value::Int(v) => match v {
                     0 ..= 255 => Self(v as u8),
                     _ => Err("must be between 0 and 255")?,
                 },
-                Value::Relative(v) => if (0.0 ..= 1.0).contains(&v.get()) {
+                Value::Ratio(v) => if (0.0 ..= 1.0).contains(&v.get()) {
                     Self((v.get() * 255.0).round() as u8)
                 } else {
                     Err("must be between 0% and 100%")?
@@ -42,8 +42,8 @@ pub fn cmyk(_: &mut Context, args: &mut Args) -> TypResult<Value> {
 
     castable! {
         Component,
-        Expected: "relative",
-        Value::Relative(v) => if (0.0 ..= 1.0).contains(&v.get()) {
+        Expected: "ratio",
+        Value::Ratio(v) => if (0.0 ..= 1.0).contains(&v.get()) {
             Self((v.get() * 255.0).round() as u8)
         } else {
             Err("must be between 0% and 100%")?
diff --git a/src/library/utility/math.rs b/src/library/utility/math.rs
index 0aebc573..272ececa 100644
--- a/src/library/utility/math.rs
+++ b/src/library/utility/math.rs
@@ -39,9 +39,11 @@ pub fn abs(_: &mut Context, args: &mut Args) -> TypResult<Value> {
         Value::Float(v) => Value::Float(v.abs()),
         Value::Length(v) => Value::Length(v.abs()),
         Value::Angle(v) => Value::Angle(v.abs()),
-        Value::Relative(v) => Value::Relative(v.abs()),
-        Value::Fractional(v) => Value::Fractional(v.abs()),
-        Value::Linear(_) => bail!(span, "cannot take absolute value of a linear"),
+        Value::Ratio(v) => Value::Ratio(v.abs()),
+        Value::Fraction(v) => Value::Fraction(v.abs()),
+        Value::Relative(_) => {
+            bail!(span, "cannot take absolute value of a relative length")
+        }
         v => bail!(span, "expected numeric value, found {}", v.type_name()),
     })
 }