Compare and show diffs between faechersystematik-versions

compare_destatis_versions.py

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+from rdflib import Graph
+import csv
+
+current_classification = "https://raw.githubusercontent.com/dini-ag-kim/hochschulfaechersystematik/master/hochschulfaechersystematik.ttl"
+new_classification = "hochschulfaechersystematik.ttl" # path of the newly created version
+
+data_old = Graph().parse(current_classification, format="ttl")
+data_new = Graph().parse(new_classification, format="ttl")
+
+query = """
+    PREFIX skos: <http://www.w3.org/2004/02/skos/core#>
+    
+    SELECT ?notation ?prefLabel
+    WHERE {
+        ?s skos:notation ?notation.
+        ?s skos:prefLabel ?prefLabel . 
+        FILTER langmatches(lang(?prefLabel) , 'de')
+    }
+"""
+
+new_notation_output = open("new_notations.csv", "w")
+changed_label_output = open("changed_labels.csv", "w")
+deprecated_notation_output = open("deprecated_notations.csv", "w")
+
+old_dict = {}
+for r in data_old.query(query):
+    old_dict.update({str(r['notation']): str(r['prefLabel'])})
+
+for r in data_new.query(query):
+    new_notation = str(r['notation'])
+    new_preflabel = str(r['prefLabel'])
+    if new_notation in old_dict.keys():
+        if new_preflabel != old_dict[new_notation]:
+            changed_label_output.write(new_notation + ";" + new_preflabel + ";Old label: " + old_dict[new_notation] + "\n" )
+        del old_dict[new_notation]
+    else:
+        new_notation_output.write(new_notation + ";" + new_preflabel + "\n")
+
+for k, v in old_dict.items():
+    csv.writer(deprecated_notation_output, delimiter=";").writerow([k,v])