The ICE Manuals may be downloaded from this page as PDF files.

Markup Manual for Written Texts (PDF, 256 KB)  
Markup Manual for Spoken Texts (PDF, 224 KB)

POS ICE Tagging Manual (PDF, 266 KB). See also: A Quick Guide to the ICE-GB Grammar (on the UCL website)

PENN Treebank Tagset

Pro3GReS Dependency Labels (PDF, 2 MB)

CLAWS7 Tagset (PDF, 125 KB)
UCREL Semantic Analysis System (USAS)