TEI – Text Encoding Initiative
http://www.tei-c.org/

Expert Advisory Group on Language Engineering Standards (EAGLES)
http://www.ilc.cnr.it/EAGLES/home.html

CES – Corpus Encoding Standard
http://www.cs.vassar.edu/CES/

Encoding the British National Corpus, di G. Burnage and D. Dunlop
http://www.oasis-open.org/cover/bnc-encoding2.html