1. Document Object Model Requirements

1.2 Structure Navigation

This refers to the navigation around a document, such as finding the parent of a given element, or what children elements a given parent element contains.

1.2.1 General Requirements

1. All document content, including elements and attributes, will be programmatically accessible and manipulable.
2. Navigation from any element to any other element will be possible, except where such navigation would compromise security.
3. There will be a way to uniquely and reproducibly enumerate the structure of static documents.
4. There will be a way to query for elements and attributes, subject to security and privacy considerations.
5. Basic low-level functions (get first, get next, etc.) will be provided, along with convenience functions that build upon them, but have a consistent access method.

1.2.2 HTML Requirements

These are specific to HTML documents.

1. All elements known to the user agent are exposed.
2. Unknown tags and attributes are exposed.
3. Implied elements are exposed even if not explicitly defined in the document (e.g., HTML, HEAD, BODY)
4. There will be guidelines for the inclusion of new elements and attributes in the object model