All,
As part of this my work on this ISO TR
http://www.aitcnet.org/isai/
I wrote a discussion paper on the various techniques
used to write computer language specifications and the
technical terms used by different groups.
http://www.knosof.co.uk/vulnerabilities/langconform.pdf
I think I have covered all the major issues and conformance
terms. Please let me know if you think I have missed anything.