WEKA: export metadata

[Amir Zeldes]

The WEKA exporter should also export metadata. It should be possible to either ask for all metadata available using the configuration box at the bottom of the interface, or just individual metadata annotations. If the AQL query already includes metadata, its values should be outputted in the export, e.g.:

lemma="Hund" & pos="NN" & #1 _=_ #2 & meta::l1_1=/f.*/

should output something like:

Hund,NN,fin
Hund,NN,fin
Hund,NN,fra

etc., with a separate column for the particular value of each metadata annotation.

[Amir Zeldes (amir-zeldes)]

Explicitly asked for at least by Falko, John Lee (Hong Kong), this would probably be useful to anyone working quantitatively with metadata.

[Thomas Krause (krause)]

Meta data is exported but not limited to the keys that are in the query. So it should must be more restrictive.