WikiChem:ChemCOinS

ChemCOinS is a method of allowing the automatic recognition of information related to chemical substances on the World Wide Web. It works by embedding ContextObjects that identify a particular chemical substance into the HTML code of a webpage. The ContextObjects are encoded using the KEV format and placed as the title of an empty HTML span with the class chemcoins.

ChemCOinS was developed by Nigel Wheatley for WikiChem: the current version is 1.0-2009. The name is derived from "ContextObjects in Spans" and the COinS system used to encode bibliographic metadata.

On WikiChem, ChemCOinS tags are inserted by the {{Substance identification}} template and by the {{Chembox Identifiers}} module of the chembox.

Fields

Each field is separated by &

• ctx_ver=Z39.88-2004

a reference to ANSI/NSO standard Z39.88 (2004)

• rft_val_fmt=http%3A%2F%2Fpluto.potsdam.edu%2Fwikichem%2Findex.php%2FWikiChem%3AChemCOinS

to be completed

• rft_id=

the hashed version of the standard InChI

• rft_key=

the hashed version of the version 1.0 InChI

• rft_cas=

the CAS registry number

• rft_ec

the EC number

A valid ChemCOinS ContextObject must contain the ctx_ver and rft_val_fmt fields and at least one of the other fields.

Example

The ChemCOinS tag for caesium bromide is:

<span class="chemcoins" title="ctx_ver=Z39.88-2004&rft_val_fmt=http%3A%2F%2Fpluto.potsdam.edu%2Fwikichem%2Findex.php%2FWikiChem%3AChemCOinS&rft_id=LYQFWZFBNBDLEO-UHFFFAOYSA-M&rft_key=LYQFWZFBNBDLEO-REWHXWOFAA&rft_cas=7787-69-1&rft_ec=232-130-0"></span>