Adjust skos2json-script for more flexible processing input-files (#RP…

…B-207)

* Create an output-folder
* Set "definition" as OPTIONAL in the SPARQL-query, as it is not given in all input-files.

scripts/skos2json.py

@@ -1,10 +1,15 @@
 import rdflib
-from rdflib import Graph
+import sys
+import os
+
+if not os.path.exists('output'):
+   os.makedirs('output')
 
 g = rdflib.Graph()
 
 # Load file in format ttl
-g.parse("rpb-spatial.ttl", format="ttl")
+input_file = sys.argv[1]
+g.parse("./%s" % input_file, format="ttl")
 
 # SPARQL query for URI and label of each concept
 qres = g.query(
@@ -14,12 +19,15 @@
     SELECT ?label ?concept ?definition
        WHERE {
            ?concept a skos:Concept ;
-                skos:prefLabel ?label ;
-                skos:definition ?definition
+                skos:prefLabel ?label .
+               OPTIONAL {?concept skos:definition ?definition}
        }""")
 
 # Write results to file per line
-with open("rpb-spatial.ndjson", "a") as output:
-    for row in qres:
-        output.write("{\"prefLabel\":\"%s\",\"uri\":\"%s\",\"definition\":\"%s\"}" % row) 
-        output.write("\n") # add a new line delimiter to start new line
+with open("output/%s.ndjson" % input_file.replace(".ttl",""), "w") as output:
+   for row in qres:
+        if row.definition is not None:
+           output.write("{\"prefLabel\":\"%s\",\"uri\":\"%s\",\"definition\":\"%s\"}\n" % row)
+        else:
+            row = row[0:2]
+            output.write("{\"prefLabel\":\"%s\",\"uri\":\"%s\"}\n" % row)