Template:Accession relations

Renders one group of related accessions for Template:Infobox accession.

Two sources feed one group. Accessions that exist come from a query, so a relationship typed on either of two pages shows on both and nothing has to be edited twice. Values typed into this page that are not pages are printed as plain text after them, because several accessions carry free text such as All Khati Accessions in related_accession and linking those would assert pages that nobody is going to write. A value that is a page is left to the query, so nothing appears twice.

The #ask sits at the top level of a template because an ask nested directly inside #if with |-escaped pipes reaches SMW as one unsplit argument and fails; Template:RecordRelated exists for the same reason. The query is written twice, once as a one-row probe that decides whether the group renders at all and once for the rows, so that a group with nothing to show prints nothing rather than an empty heading.

Parameters:

• rel - which relation to show.
  • children: accessions whose parent_accession is this page, that is, the material grown from it.
  • samepop: same_population_accessions, read in both directions.
  • related: related_accession, read in both directions.
• page - the accession being rendered, normally Template:Accession relations.
• typed - the matching field of this page, so that values naming no page still show.
• label - the group heading.
• limit - maximum rows, 24 by default.

Query notes, each of which has caught this wiki before:

• [[Category:Accessions]] keeps values that name no accession out of the query.
• There is no sort: a sort on a property silently drops every result that lacks

 it. Default title order is the accession ID, which every accession page has.

• Class names use single hyphens, because a double underscore inside an ask parameter is

 flattened to a space.

• The #arraymap variable is @@, not x: arraymap replaces

 every occurrence of the variable in the formula, so an x variable rewrites
 {{#ifexist: into {{#ife<value>ist: and the call renders as
 literal text.