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Author: justin2004

characters.json

@@ -3,17 +3,17 @@
     {
       "firstname": "Ash",
       "lastname":"Ketchum",
-      "items":[ {"name_variation":"bowl of soup","weight":1000},
+      "items":[ {"name_variation":"bowl of soup","weight":30},
                 {"name":"spoon","alias":"Ash's spoon"},
-                {"name":"gloves", "weight":340, 
+                {"name":"gloves", "weight":20, 
                  "wikidata_item":"Q169031"},
-                {"name":"sword", "weight":44400}
+                {"name":"sword", "weight":400}
       ]
     },
     {
       "firstname": "Misty",
       "lastname":"Mountain",
-      "items":[ {"name":"gloves", "weight":340},
+      "items":[ {"name":"gloves", "weight":16},
                 {"name_variation":"mittens"}
       ]
     },

characters.pp.json

@@ -1,60 +1 @@
-{
-  "characters": [
-    {
-      "firstname": "Ash",
-      "lastname": "Ketchum",
-      "items": [
-        {
-          "name_variation": "bowl of soup",
-          "weight": 1000,
-          "_id": 1
-        },
-        {
-          "name": "spoon",
-          "alias": "Ash's spoon",
-          "_id": 2
-        },
-        {
-          "name": "gloves",
-          "weight": 340,
-          "wikidata_item": "Q169031",
-          "_id": 3
-        },
-        {
-          "name": "sword",
-          "weight": 44400,
-          "_id": 4
-        }
-      ],
-      "_id": 5
-    },
-    {
-      "firstname": "Misty",
-      "lastname": "Mountain",
-      "items": [
-        {
-          "name": "gloves",
-          "weight": 340,
-          "_id": 6
-        },
-        {
-          "name_variation": "mittens",
-          "_id": 7
-        }
-      ],
-      "_id": 8
-    },
-    {
-      "firstname": "Misty",
-      "wikidata_item": "Q1057356",
-      "items": [
-        {
-          "name": "hair tie",
-          "_id": 9
-        }
-      ],
-      "_id": 10
-    }
-  ],
-  "_id": 11
-}
+{"characters":[{"firstname":"Ash","lastname":"Ketchum","items":[{"name_variation":"bowl of soup","weight":30,"_id":1},{"name":"spoon","alias":"Ash's spoon","_id":2},{"name":"gloves","weight":20,"wikidata_item":"Q169031","_id":3},{"name":"sword","weight":400,"_id":4}],"_id":5},{"firstname":"Misty","lastname":"Mountain","items":[{"name":"gloves","weight":16,"_id":6},{"name_variation":"mittens","_id":7}],"_id":8},{"firstname":"Misty","wikidata_item":"Q1057356","items":[{"name":"hair tie","_id":9}],"_id":10}],"_id":11}

json2rdf_and_sparql/query.sparql

@@ -1,11 +1,12 @@
+prefix wd: <http://www.wikidata.org/entity/>
+prefix xsd: <http://www.w3.org/2001/XMLSchema#>
 prefix tmp: <http://tmp.com/#>
-prefix ex: <http://example.com/#>
+prefix ex: <http://example.com/>
 prefix sch: <http://schema.org/>
-prefix owl: <http://www.w3.org/2002/07/owl>
+prefix owl: <http://www.w3.org/2002/07/owl#>
 prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
 
 construct {?char a sch:Person .
-           ?char sch:has ?o .
            ?char sch:givenName ?fname .
            ?char sch:familyName ?lname .
            ?char owl:sameAs ?sameURI .
@@ -14,25 +15,23 @@ construct {?char a sch:Person .
            ?collection sch:hasPart ?item .
            ?item sch:name ?item_name .
            ?item sch:weight ?item_weight_structure .
+           ?item rdf:type ?typeURI .
            ?item_weight_structure rdf:value ?item_weight .
            ?item_weight_structure ex:units ex:ounces .
- } where{
+} where {
 { ?top_array tmp:characters ?char .
   bind(bnode() as ?collection) .}  # make a collection for each character
-optional {?char tmp:firstname ?fname .}
-optional {?char tmp:lastname ?lname .}
-optional {?char tmp:wikidata_item ?same .
-          bind(uri(concat("http://wikidata.org/entity/",?same)) as ?sameURI)}
-optional {?char tmp:items ?item .
- optional {?item tmp:name ?item_name .}
- optional {?item tmp:weight ?item_weight .
-           bind(bnode() as ?item_weight_structure) # make a weight structure for each weight
-          }
-  .} 
+  optional {?char tmp:firstname ?fname .}
+  optional {?char tmp:lastname ?lname .}
+  optional {?char tmp:wikidata_item ?same .
+            bind(uri(concat("http://www.wikidata.org/entity/",?same)) as ?sameURI)}
+  optional {?char tmp:items ?item .
+            optional {?item tmp:name ?item_name .}
+            optional {?item tmp:wikidata_item ?item_type_q .
+                      bind(uri(concat("http://www.wikidata.org/entity/",?item_type_q)) as ?typeURI)}
+            optional {?item tmp:weight ?item_weight .
+                      bind(bnode() as ?item_weight_structure) # make a weight structure for each weight
+                     }}
 }
 
-# notes https://www.w3.org/TR/sparql11-query/#templatesWithBNodes does not work if you want the same blank node to used for multiple query solutions
-#   so i needed to preprocess -- NOPE!
-
-
 # major thanks to  https://stackoverflow.com/questions/46155991/produce-the-same-blank-node-in-construct-across-multiple-solutions

mapping.rml.ttl

@@ -3,19 +3,17 @@
 @prefix ql: <http://semweb.mmlab.be/ns/ql#> .
 @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
 @prefix : <http://example.org/rules/> .
-@prefix ex: <http://example.org/example/> .
+@prefix ex: <http://example.com/> .
 @prefix schema: <http://schema.org/> .
 @prefix dbo: <http://dbpedia.org/ontology/> .
 @prefix owl: <http://www.w3.org/2002/07/owl#> .
 
 # this approach assumes:
-#    -  the .json was preprocessed so that each object has a unique "_id" key.
+#    - the .json was preprocessed so that each object has a unique "_id" key.
 #    - that you want to error on the side of generating a blank node (only referencing a URI if you have enough individuating keys)
 
 # it uses structured values (https://www.w3.org/TR/rdf-schema/#ch_value) 
 
-# NOTE i have not taken the time to pick proper predicates
-
 # TODO how can i autoindent .ttl?
 
 :Chars a rr:triplesMap ;
@@ -34,11 +32,15 @@ rr:constant schema:Person;
 ];
 ];
 rr:predicateObjectMap [
-    rr:predicate schema:name;
+    rr:predicate schema:givenName;
 rr:objectMap [ rml:reference "firstname" ]
 ];
 rr:predicateObjectMap [
-    rr:predicate schema:has;
+    rr:predicate schema:familyName;
+rr:objectMap [ rml:reference "lastname" ]
+];
+rr:predicateObjectMap [
+    rr:predicate schema:owns;
 rr:objectMap [ rr:template "char-{_id}-pos" ;
                rr:termType rr:BlankNode ]
 ];
@@ -65,7 +67,7 @@ rr:objectMap [
 ] 
 ];
  rr:predicateObjectMap [
-    rr:predicate schema:contains;
+    rr:predicate schema:hasPart;
 rr:objectMap [ rr:template "item-{items[*]._id}" ;
                rr:termType rr:BlankNode ]
 ].
@@ -123,8 +125,8 @@ rr:predicateObjectMap [
 ];
 ];
 rr:predicateObjectMap [
-  rr:predicate :units ;
+  rr:predicate ex:units ;
   rr:objectMap [
-    rr:constant :ounces ;
+    rr:constant ex:ounces ;
 ];
 ].