Definitions

The definitions below are an essential part of the parser.

Node Types

The type of node is determined during parsing and represented by one of the elements in the list below.

Type	Description
`HDOM_TYPE_ELEMENT`	Start tag (i.e. `<html>`)
`HDOM_TYPE_COMMENT`	HTML comment (i.e. `<!-- Hello, World! -->`)
`HDOM_TYPE_TEXT`	Plain text (i.e. `Hello, World!`)
`HDOM_TYPE_ROOT`	Root element. There can always only be one root element in the DOM.
`HDOM_TYPE_UNKNOWN`	Unknown type (i.e. CDATA, DOCTYPE, etc...)

<!DOCTYPE html><html><!-- Hello, World! --></html>Hello, World!

Note: HDOM_TYPE_ROOT always exists regardless of the actual document structure.

Identifies the quoting type on attribute values.

Note: Attributes with no values (flags) are stored as HDOM_QUOTE_NO.

<p class="paragraph" id='info1' hidden>Hello, World!</p>

Each node stores additional information (metadata) that is identified by the elements below.

Type	Description
`HDOM_INFO_BEGIN`	Cursor position for the start tag of a node.
`HDOM_INFO_END`	Cursor position for the end tag of a node. A value of zero indicates a node with no end tag (missing closing tag).
`HDOM_INFO_QUOTE`	Quote type for attribute values. The value must be an element of Quote Type.
`HDOM_INFO_SPACE`	Array of whitespace around attributes (see Attribute Whitespace).
`HDOM_INFO_TEXT`	Non-HTML text in tags (i.e. comments, doctype, etc...).
`HDOM_INFO_INNER`	Inner text of a node.
`HDOM_INFO_OUTER`	Outer text of a node.
`HDOM_INFO_ENDSPACE`	Whitespace at the end of a tag before the closing bracket.

Whitespace around attributes is stored in the form of an array with three elements:

Element	Description
`0`	Whitespace before the attribute name.
`1`	Whitespace between attribute name and the equal sign.
`2`	Whitespace between the equal sign and the attribute value

<p class="paragraph" id = 'info1'hidden>Hello, World!</p>

Note: Whitespace before attribute names is not displayed in the browser. It is, however, part of the attributes.