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Changes from DITA 1.0 to DITA 1.1
The DITA 1.1 specification was designed to be backwards-compatible with applications that conform to the DITA 1.0 specification.
The following major changes to the architecture provided added functionality for DITA 1.1:
A bookmap specialization for encoding book-specific information in a DITA map
A glossentry specialization for glossary entries
Indexing specializations for see, see-also, page ranges, and sort order
Improvements to graphic scaling capability
Improved short description flexibility through a new abstract element
Specialization support for new global attributes, such as conditional processing attributes
Support for integration of existing content structures through the foreign element
Support for new kinds of information and structures through the data and unknown elements
Formalization of conditional processing profiles