Some schema elements and attributes allow any type of data in an XML file. Use these elements and attributes when you need to validate an XML file that has unidentified element and attribute types.
Use the following element and attributes that allow any type of data:
anyType element.
Allows an element to be any datatype in the associated XML file.
anySimpleType element.
Allows an element to be any simpleType in the associated XML file.
ANY content element.
Allows an element to be any element already defined in the schema.
anyAttribute attribute.
Allows an element to be any attribute already defined in the schema.