I want to do binding on a SPARQL query before sending it over the wire. Consider this query:
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX meshv: <http://id.nlm.nih.gov/mesh/vocab#> SELECT ?descriptor ?label FROM <http://id.nlm.nih.gov/mesh> WHERE { ?descriptor a meshv:Descriptor . ?descriptor rdfs:label ?label . FILTER(REGEX(?label, 'Cobra')) } ORDER BY ?label How can I construct such a query without providing the expression literal, and then render it as a query? I've gotten as far as this: from rdflib.namespace import RDFS, Namespace from rdflib.plugins.sparql import prepareQuery MESHV = Namespace('http://id.nlm.nih.gov/mesh') prefixen = { 'rdfs': RDFS, 'meshv': MESHV } q = prepareQuery("""SELECT ?descriptor, ?label WHERE { ?descriptor a meshv:Descriptor . ?descriptor rdfs:label ?label . FILTER(REGEX(?label, ?expr)""", initNs=prefixen) What do I do from here to bind the variable "expr" to the literal "Cobra" and then format back as a query? What if I am attempting to construct or describe rather than select? Looking at packages, rdfalchemy looks a lot better here than SPARQLWrapper, but rdfalchemy does not install in my Python 3 environment. BTW - I'm the implementer and maintainer of the Medical Subject Headings (MeSH) in RDF, and the query I posit above can be run at https://id.nlm.nih.gov/mesh/query - enjoy. -- http://github.com/RDFLib --- You received this message because you are subscribed to the Google Groups "rdflib-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to rdflib-dev+unsubscr...@googlegroups.com. To post to this group, send email to rdflib-dev@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rdflib-dev/0cd930c1-462d-4012-9414-03e1c77c1758%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
