Author: Alastair Scott
Date: 10:23:11 03/21/03
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On March 21, 2003 at 13:03:10, Harald Faber wrote: >Could anyone help me finding out which tags to use for unknown/empty PGN tags? >Which fields are definitely required, and in which case is a '*' to enter, in >which case a '?' when the information is missing? >Any hints and/or links welcome. The * is _only_ used to denote an unknown result or incomplete or abandoned game at the end of the algebraic notation. It doesn't appear in tags. ? or ?? is used when data for tags is missing. There are the 'seven deadly tags' which _must_ be present in the header for each game (see the PGN standard, section 8) and _must_ have "?" put in where data for these tags is missing (eg [Date "2003.??.??"] or [Round "?"]). What happens with the many optional tags (PGN standard, section 9) is not clear when the data for that tag does not exist; presumably the tag could either be omitted completely for that game or ? used appropriately (eg [EventDate "????.??.??"] or [BlackElo "?"]). The PGN standard can be got from, among other places, http://pgn.freeservers.com/ Unfortunately there seems to be a lack of version control or a definitive site from which the standard is made available so there are various versions around: many I've seen do not have section 18 filled in, for example. Alastair
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