The parser calls this method for each attribute declared. The call represents the declaration of the attribute named attribute for the element type element. The data type of the attribute, given as type, is provided as a string with a value of CDATA, ENTITY, ENTITIES, ID, IDREF, IDREFS, NMTOKEN, NMTOKENS, or NOTATION, or as a list of strings for enumerated types. The constraint is given as a string or None, with the possible string values #FIXED, #IMPLIED, and #REQUIRED. If the attribute has a default value, it is provided as default; if no default is defined, default is None.

This method is called by the parser when it encounters an element declaration. name is the name of the element type, and contentModel is its content model. The content module is the string EMPTY, the string ANY, or a tuple containing the model separator character, the list of element type names, and the quantity modifier.

When the parsers see the definition of an external parsed entity, it calls this method to inform the application. The name is the name assigned to the entity, publicId is the public identifier or None, and systemId is the system identifier.

The parser calls this method when an internal general entity is defined. The name is the name assigned to the entity and value is a string giving the replacement text for the entity.