Include tables as concept (sub)schemes

[nichtich]

According to Mitchell et al (2013) tables have an URI of their own, so in addition to

<http://dewey.info/class/2--162/> skos:inScheme <http://dewey.info/scheme/>

this should also be stated:

<http://dewey.info/class/2--162/> skos:inScheme <http://dewey.info/table/2/>

Tables are part of the full scheme but table entries are never topConceptOf the DDC. Unfortunately we cannot check dewey.info how it was originally modelled.

[danmichaelo]

Turns out we can: https://web.archive.org/web/20150204021015/http://dewey.info/class/2--4897/about