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     An XBRL linkbase file contains the explicit relationship definitions between the concepts defined in the XBRL schema.
     In general there are six linkbase types defined by the XBRL version 2.1 specification:
1.The label linkbase allows the user to attach labels with different roles and languages to a given concept.
2.The reference linkbase allows the user to attach external information (authoritative sources) to concepts.
3.The presentation linkbase defines how concepts are nested and ordered.
4.The calculation linkbase defines how values of concepts should, for example, sum up from one to another.
5.The definition linkbase allows the user to define additional semantics and relationships.
6.The footnote linkbase allows the user to relate a footnote description to a concept
Anatomy of an XBRL Taxonomy -
Linkbase Files
Added MFS