Some examples (1)

USMARC:

245 00 Wordnews online $h [computer file].
246 3 World news online
256 Computer online service.
260 Washington, D.C. : $b Worldnews Online, $c [1995-
538 Mode of access: Internet.
500 Title from title frame.
520 “WorldNews OnLine is a service … “
650 0 Newspapers $x Databases.
856 7 $u http://worldnews.net $2 http

Extract from: Nancy B. Olson, ed., Cataloguing Internet resources: a manual and practical guide, 2nd ed. Dublin, Ohio: OCLC Online Computer Library Center, 1997.

http://www.purl.org/oclc/cataloging-internet