Setting custom display order for top levels of a concept scheme

[Jessica Cleary-Kemp]

Hi Holger,

I am wondering if there is a simple way to create a custom display order to view top levels of a concept scheme in the nav pane within a taxonomy. Right now they order themselves alphabetically, so as a workaround we sometimes prepend a number to the skos:prefLabel to get them to display how we want. But I suspect there is a better way. Any tips?

e.g., if I have the two top level concepts "High school diploma" and "Bachelor's Degree" I don't want them to display in the navigation pane in alphabetical order because it's counter intuitive. So right now I would name them "1. High school diploma" and "2. Bachelor's Degree", for example.

[Holger Knublauch]

Hi Jessica,

Yes it is possible, see the property

teamwork:taxonomyTreeOrderByExpr

  a rdf:Property ;

  rdfs:comment """A SPARQL expression that is used to order the nodes in a Taxonomy tree. The expression is evaluated with $value as a pre-bound value as the URI of the current tree node - note this is an xsd:string literal, not a IRI node. The expression can return any RDF node that can be compared to the results of other calls. For example, use COALESCE(<http://spinrdf.org/spl#object>(IRI($value), <http://example.org/property>), <http://uispin.org/ui#label>(IRI($value))) to sort by the values of a given example property, falling back to the display label (ui:label) if absent.

Values of this property are expected to be attached to the owl:Ontology instance of the master graph of a taxonomy. Imported values are being ignored right now, pending user feedback.""" ;

  rdfs:label "taxonomy tree order by expr" ;

  rdfs:range xsd:string ;

.

For example, this will order the concepts by the length of their display labels:

<urn:x-evn-master:test>

a <http://evn.topbraidlive.org/evnprojects#Taxonomy> ;

a teamwork:Vocabulary ;

a owl:Ontology ;

teamwork:taxonomyTreeOrderByExpr "STRLEN(tbs:label(IRI($value)))" ;

HTH

Holger

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[Jessica Cleary-Kemp]

It works!

Thanks so much Holger.

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