Atom is an integer code for a string. The zero value maps to "".

An Attribute is an attribute namespace-key-value triple. Namespace is non-empty for foreign attributes like xlink, Key is alphabetic (and hence does n

A Node consists of a NodeType and some Data (tag name for element nodes, content for text) and are part of a tree of Nodes. Element nodes may also hav

A NodeType is the type of a Node.

A Token consists of a TokenType and some Data (tag name for start and end tags, content for text, comments and doctypes). A tag Token may also contain

A TokenType is the type of a Token.

A Tokenizer returns a stream of HTML Tokens.

An insertion mode (section 12.2.3.1) is the state transition function from a particular state in the HTML5 parser's state machine. It updates the pars

nodeStack is a stack of nodes.

A parser implements the HTML5 parsing algorithm: http://www.whatwg.org/specs/web-apps/current-work/multipage/tokenization.html#tree-construction

span is a range of bytes in a Tokenizer's buffer. The start is inclusive, the end is exclusive.