Document Profiles

Document Profiles can be described at three levels:

• Profile Name
• A set of features/module names
• Profile definition as a set of assertions

The profile definition is a set of machine interpretable assertions which provide basis for interoperability guarantees:

• How long the profile can be safely cached
• A grammar constraining the markup of conforming documents
• The set of content types & data formats supported by browsers
• Additional details, e.g. the subset of CSS properties and which tags they apply to, and similarly for scripting support
• Requirements on browser capabilities, e.g. display size
• A link to a human readable description of the profile
• Additional information about who has defined the profile and when (attribution and copyright).