Document attribute UDC (Universal Decimal Classification)

[Intelligent2013]

Source issue: #1089

Before 1992, ISO published the UDC (Universal Decimal Classification) instead of ICS (International Classification of Standards)
(found here https://docs.wto.org/dol2fe/Pages/SS/directdoc.aspx?filename=q:/G/TBT/GEN312.pdf&Open=True)

Example (https://cdn.standards.iteh.ai/samples/14/2c071d0698d64948a4b9f21a6314072b/ISO-R-1-1951.pdf):

Currently, Metanorma supports ICS via the attribute :library-ics: (https://www.metanorma.org/author/ref/document-attributes/#document-info):

Add the attribute :library-udc:.

[opoudjis]

I'm going to see if I can generalise this somehow, as library-* for any taxonomy classification.

[ronaldtse]

The Chinese also use their own taxonomy. A generalized solution would work great, for ICS and things we support we could do validation but for others we can at least accept them. It also gives us a chance to accept multiple taxonomy classification values.

[opoudjis]

We already have provision for multiple classification elements in bibdata/classification: <classification type="UDC">600.1</classification>. I had hard coded ics as an bibdata/ext element, but I think it would be fine to leave that as a legacy exception, and process all other classifications as library-*.

[Intelligent2013]

Also we need to support the localized strings for UDC:

• fr: CDU
• ru: УДК

[opoudjis]

library-* is too obscure, so I'm going to make it classification-*. The canonical value shall indeed be UDC.

[opoudjis]

Strike that: we already support bibdata/classification, as :classification: UDC:563.5.081, UDC:537.71. We only allow a single value per classification token. Documenting that, rather than playing silly buggers with multiple values in a key-value pair. I will concatenate the values in Presentation XML.

[opoudjis]

Also we need to support the localized strings for UDC:

• fr: CDU
• ru: УДК

This will be provided in the localization-string for classification-UDC.

[opoudjis]

Ah, I forgot: that colon is not a distinct value, it is a relator. UDC is not Dewey, and it liberally uses + / : [ ] * -

[opoudjis]

:classification: UDC:563.5.081:537.71

results in the following in Presentation XML:

<bibdata type="standard">
...
<classification type="UDC">563.5.081:537.71</classification>
...
</bibdata><localized-strings>
...
<localized-string key="classification-UDC" language="en">UDC</localized-string>
...

[Intelligent2013]

@opoudjis thank you!