Create javascript_snippets.md

javascript_snippets.md

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+## LINDAS, use POST request, x-www-form-urlencoded and json as result
+```javascript
+let queryBody = "PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> " + 
+            "PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> " +
+			" SELECT * WHERE { " +
+	   	"?sub_1 <https://www.ica.org/standards/RiC/ontology#hasRecordSetType> ?all. " +
+	   			"VALUES ?all {<https://culture.ld.admin.ch/ais/vocabularies/recordSetTypes/1> <https://culture.ld.admin.ch/ais/vocabularies/recordSetTypes/10001> <https://culture.ld.admin.ch/ais/vocabularies/recordSetTypes/10003> } " +
+	    "    ?sub_1 <https://www.ica.org/standards/RiC/ontology#title> ?title. " +
+	    "    ?sub_1 <https://www.ica.org/standards/RiC/ontology#hasRecordSetType> ?level. " +
+		"} LIMIT 1000000";
+
+var details = {
+    'query': queryBody,
+    'lang': 'de'
+};
+
+var formBody = [];
+for (var property in details) {
+  var encodedKey = encodeURIComponent(property);
+  var encodedValue = encodeURIComponent(details[property]);
+  formBody.push(encodedKey + "=" + encodedValue);
+}
+formBody = formBody.join("&");
+
+var url = "https://lindas.admin.ch/query";
+
+async function asyncCall() {
+	let response = await fetch(
+		url,
+		{
+			method: 'POST',
+			headers: {
+				'accept' : "application/sparql-results+json,*/*;q=0.9",
+				'content-type' : "application/x-www-form-urlencoded"
+			},
+			body: formBody
+		}
+	);
+	let responsetext = await response.text(); 
+	console.log(responsetext);
+	let adapteddata = adaptdata(responsetext);
+	visualizedata(adapteddata);
+}
+```