XML Fragment Package Namespace

see: XML Fragment Interchange 12 February 2001

This namespace name (URI) will only be used to refer to this version of this specification: different URIs will be used for any and all new versions of the specification except as follows.

This namespace name may be reused in any update of the specification which is made for the purpose of clarification or bug fixes. These changes will be minor in that they do not
- change the meaning or validity of existing documents written using the namespace, nor
- affect the operation of existing software written to process such documents.