Added headings + examples to the changelog.

doc/changelog.md

@@ -2,37 +2,103 @@
 
 ## 0.2.0 - Unreleased
 
+### SAX API
+
 A SAX parser/API has been added. This API is useful when even the overhead of
-the pull-parser is too much memory wise.
+the pull-parser is too much memory wise. Example:
+
+    class ElementNames
+      attr_reader :names
+
+      def initialize
+        @names = []
+      end
+
+      def on_element(namespace, name, attrs = {})
+        @names << name
+      end
+    end
+
+    handler = ElementNames.new
+
+    Oga.sax_parse_xml(handler, '<foo><bar></bar></foo>')
+
+    handler.names # => ["foo", "bar"]
+
+### Racc Gem
 
 Oga will now always use the Racc gem instead of the version shipped with the
 Ruby standard library.
 
+### Error Reporting
+
 XML parser errors have been made a little bit more user friendly, though they
 can still be quite cryptic.
 
+### Serializing Elements
+
 Elements serialized to XML/HTML will use self-closing tags whenever possible.
 When parsing HTML documents only HTML void elements will use self-closing tags
-(e.g. `<link>` tags).
+(e.g. `<link>` tags). Example:
+
+    Oga.parse_xml('<foo></foo>').to_xml        # => "<foo />"
+    Oga.parse_html('<script></script>').to_xml # => "<script></script>"
+
+### Default Namespaces
 
 Namespaces are no longer removed from the attributes list when an element is
 created.
 
 Default XML namespaces can now be registered using `xmlns="..."`. Previously
-this would be ignored.
+this would be ignored. Example:
 
-Oga can now lex input such as `</` without entering an infinite loop.
+    document = Oga.parse_xml('<root xmlns="baz"></root>')
+    root     = document.children[0]
+
+    root.namespace # => Namespace(name: "xmlns" uri: "baz")
+
+### Lexing Incomplete Input
+
+Oga can now lex input such as `</` without entering an infinite loop. Example:
+
+    Oga.parse_xml('</') # => Document(children: NodeSet(Text("</")))
+
+### Absolute XPath Paths
 
 Oga can now parse and evaluate the XPath expression "/" (that is, just "/").
-This will return the root node (usually a Document instance).
+This will return the root node (usually a Document instance). Example:
+
+    document = Oga.parse_xml('<root></root>')
+
+    document.xpath('/') # => NodeSet(Document(children: NodeSet(Element(name: "root"))))
+
+### Namespace Ordering
 
 Namespaces available to an element are now returned in the correct order.
 Previously outer namespaces would take precedence over inner namespaces, instead
-of it being the other way around.
+of it being the other way around. Example:
+
+    document = Oga.parse_xml <<-EOF
+    <root xmlns:foo="bar">
+      <container xmlns:foo="baz">
+        <foo:text>Text!</foo:text>
+      </container>
+    </root>
+    EOF
+
+    foo = document.at_xpath('root/container/foo:text')
+
+    foo.namespace # => Namespace(name: "foo" uri: "baz")
+
+### Parsing Capitalized HTML Void Elements
 
 Oga is now capable of parsing capitalized HTML void elements (e.g. `<BR>`).
 Previously it could only parse lower-cased void elements. Thanks to Tero Tasanen
-for fixing this.
+for fixing this. Example:
+
+    Oga.parse_html('<BR>') # => Document(children: NodeSet(Element(name: "BR")))
+
+### Node Type Method Removed
 
 The `node_type` method has been removed and its purpose has been moved into
 the `XML::PullParser` class itself. This method was solely used by the pull