@@ -21,9 +21,6 @@ Fields MUST not contains the following forbidden characters:

 [Bouchots](../ontology/bouchot.md) SHOULD replace forbidden characters by

 [SPACE](http://www.fileformat.info/info/unicode/char/0020/index.htm).

-[Bouchots](../ontology/bouchot.md) MAY strip or replace non printable characters

-by [SPACE](http://www.fileformat.info/info/unicode/char/0020/index.htm).

-

 ## id

 Technical post numeric identifier.