securities-identifier

Moved to securities-identifier as other identifiers were added

https://github.com/tarfu/securities-identifiery

ISIN

verifies ISINs

options

Parses and formats Option Contract Identifiers.

The Formats are described for here for examples: http://www.schwabcontent.com/symbology/int_eng/key_details.html
https://ibkr.info/node/972