Proposed ZIP Format Specification Additions

The items appearing below are proposed for inclusion in the next APPNOTE release.  Please review and post any questions or comments to

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ZIP Source Identifier (PKWARE):

Pending proposal to include a new source identifier record at the front of .ZIP files.  This new data structure will serve to differentiate between vendor applications that create/modify ZIP files.  Modeled after extra field structures this record would likely include:

Marker - 4 bytes TDB

Size - size of remaining record

Data - vendor defined information structure

Problem to solve: a number of ZIP users look for readily available information on what (application/vendor etc) created a given file to assist with feature support determination with less record parsing.