The REPARSE_GUID_DATA_BUFFER data element MUST be used by all non-Microsoft file systems, filters, and minifilters to store data for a reparse point. Each reparse point contains one REPARSE_GUID_DATA_BUFFER structure.Reparse point tags are assigned to independent software vendors (ISVs) by Microsoft. Reparse point GUIDs are assigned by the ISV. An ISV MUST associate one GUID to each assigned reparse point tag, and MUST always use that GUID with that tag.For more information on reparse points, see [REPARSE].If the high bit of the ReparseTag element is 0, an application MUST interpret the reparse point data as a REPARSE_GUID_DATA_BUFFER; otherwise, it MUST be interpreted as a REPARSE_DATA_BUFFER.Each reparse point MUST contain one REPARSE_GUID_DATA_BUFFER structure. The REPARSE_GUID_DATA_BUFFER data element is as follows.
