docs: document what has been ASCII-lowercased

2 files changed, 15 insertions, 3 deletions

diff --git a/src/attr.rs b/src/attr.rs
index 48ae5b0..a4a3428 100644
--- a/src/attr.rs
+++ b/src/attr.rs
@@ -61,6 +61,7 @@ pub struct Attribute<'a, O> {
 #[derive(Debug, PartialEq, Eq)]
 pub struct AttributeOwned<O> {
     /// The attribute name.
+    /// Uppercase ASCII characters (A-Z) have been converted to lowercase.
     pub name: String,
     /// The attribute value.
     pub value: String,
@@ -76,6 +77,9 @@ pub struct AttributeOwned<O> {
 
 impl<O> AttributeMap<O> {
     /// Returns the attribute with the given name.
+    ///
+    /// The name must not contain any uppercase ASCII character (A-Z)
+    /// or the method will always return `None`.
     pub fn get(&self, name: &str) -> Option<Attribute<O>> {
         self.inner
             .get_key_value(name)
@@ -85,6 +89,7 @@ impl<O> AttributeMap<O> {
 
 impl<'a, O: Offset> Attribute<'a, O> {
     /// Returns the attribute name.
+    /// Uppercase ASCII characters (A-Z) have been converted to lowercase.
     pub fn name(&self) -> &'a str {
         self.name
     }
@@ -122,6 +127,10 @@ impl<'a, O: Offset> Attribute<'a, O> {
 impl<O> Index<&str> for AttributeMap<O> {
     type Output = str;
 
+    /// Returns the attribute value with the given name.
+    ///
+    /// The name must not contain any uppercase ASCII character (A-Z)
+    /// or the method will always panic.
     fn index(&self, name: &str) -> &Self::Output {
         &self.inner[name].value
     }
diff --git a/src/emitter.rs b/src/emitter.rs
index b75334a..3fbb9e2 100644
--- a/src/emitter.rs
+++ b/src/emitter.rs
@@ -456,7 +456,8 @@ pub struct StartTag<O> {
     /// expected.
     pub self_closing: bool,
 
-    /// The start tag's name, such as `"p"` or `"a"`.
+    /// The tag name.
+    /// Uppercase ASCII characters (A-Z) have been converted to lowercase.
     pub name: String,
 
     /// A mapping for any HTML attributes this start tag may have.
@@ -480,7 +481,8 @@ impl<O: Offset> StartTag<O> {
 /// An HTML end/close tag, such as `</p>` or `</a>`.
 #[derive(Debug, Eq, PartialEq)]
 pub struct EndTag<O> {
-    /// The ending tag's name, such as `"p"` or `"a"`.
+    /// The tag name.
+    /// Uppercase ASCII characters (A-Z) have been converted to lowercase.
     pub name: String,
 
     /// The source code span of the tag.
@@ -524,7 +526,8 @@ pub struct Doctype<O> {
     /// [force-quirks flag]: https://html.spec.whatwg.org/multipage/parsing.html#force-quirks-flag
     pub force_quirks: bool,
 
-    /// The doctype's name. For HTML documents this should be "html".
+    /// The doctype's name. Uppercase ASCII characters (A-Z) have been
+    /// converted to lowercase. For HTML documents this should be "html".
     pub name: String,
 
     /// The doctype's public identifier.