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user:zeman:interset:how-to-write-a-driver [2007/09/26 20:41]
zeman Link. 		user:zeman:interset:how-to-write-a-driver [2007/10/01 13:51]
zeman Link fix.
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 If the tagset encodes features separately (e.g., each character is a value of a particular feature): The decoder should be tolerant to unexpected combinations of features (or should be able to be tolerant if asked for it). If the tagset encodes features separately (e.g., each character is a value of a particular feature): The decoder should be tolerant to unexpected combinations of features (or should be able to be tolerant if asked for it).
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 ===== encode() ===== ===== encode() =====
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 The encoder should be able to process all possible values from the [[features|central pool]]. If the tagset does not recognize a value, the most appropriate substitute should be chosen. The encoder should be able to process all possible values from the [[features|central pool]]. If the tagset does not recognize a value, the most appropriate substitute should be chosen.
  
-Since any feature can in theory have an array of values instead of a single value, the encoder should either be prepared to arrays (more precisely: array references) anywhere, or call tagset::single_values() to get rid of the arrays (or some of them).+Since any feature can in theory have an array of values instead of a single value, the encoder should either be prepared to arrays (more precisely: array references) anywhere, or call ''tagset::single_values()'' to get rid of the arrays (or some of them). See [[#Alternative values]] for more details.
  
-**WARNING:** Before modifying the contents of ''%f'', you should make a //deep// copy of it. You cannot assume that the user of the driver will not need the values in ''%f'' after encoding.+**WARNING:** Before modifying the contents of ''%f'', you should make a //deep// copy of it. You cannot assume that the user of the driver will not need the values in ''%f'' after encoding. If you have called ''single_values()'', it made the copy for you.
  
 ===== list() ===== ===== list() =====

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