[lemma=group] [tag=NNS] [lemma=","] [tag=VBG] □
[lemma=group] [tag=NNS] [lemma=","] [tag=VBG] [□]
[lemma=group] [tag=NNS] [lemma=","] [tag=VBG] (□ | □)
Work groups should maintain a registry of work group documents , using the standard TEI document numbering scheme described in document TEI A1 .