@prefix ex: <https://sparql.uniprot.org/.well-known/sparql-examples/> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix schema: <https://schema.org/> .
@prefix sh: <http://www.w3.org/ns/shacl#> .

ex:57 a sh:SPARQLExecutable,
        sh:SPARQLSelectExecutable ;
    rdfs:comment "Map a selection of PDB identifiers plus chains to UniProtKB"@en ;
    sh:prefixes _:sparql_examples_prefixes ;
    sh:select """PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX up: <http://purl.uniprot.org/core/>

SELECT
  ?pdbId ?chain ?pdbChain ?uniprot
WHERE
{
  # A space separated list of pairs of PDB identifiers and the chain code.
  VALUES(?pdbId ?pdbChain) { ('6VXC' 'A') ('1BG3' 'B') }

  # Make an IRI out of the pdbId
  BIND(iri(concat('http://rdf.wwpdb.org/pdb/', ?pdbId)) AS ?pdb)

  # Map to UniProt entries
  ?uniprot rdfs:seeAlso ?pdb .
  ?pdb up:database <http://purl.uniprot.org/database/PDB> ;
       up:chainSequenceMapping ?chainSm .
  ?chainSm up:chain ?chainsPlusRange .

  # Extract the list of chains from the text representation.
  BIND(STRBEFORE(?chainsPlusRange, '=') AS ?chain)

  # Filter those that match.
  FILTER(CONTAINS(?chain, ?pdbChain))
}""" ;
    schema:keywords "mapping" , "PDB" ;
    schema:target <https://sparql.uniprot.org/sparql/> .