Comments (4)
filip26
commented on August 19, 2024
Hi @jmvanel ,
thank you for reporting this.
Please help me prepare a test case. I understand that you do fromRdf transformation and then you apply frame transformation on the result . Not sure which transformation is erroneous, maybe both.
I can download the GeoJSON-LD context but it would be very helpful if you can provide an example of RDF input that produces the wrong result.
FYI: I've noticed a couple of things in your code:
here is duplicated code - line 118
the GeoJSON-LD context is passed as a frame, not as a context
Best regards,
Filip
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jmvanel
commented on August 19, 2024
I provide a simpler example, only JSON-LD input on frame algorithm, that produces the wrong result.
P.S. Did not understand your comment "the GeoJSON-LD context is passed as a frame, not as a context"
package jmvanel;
import java.io.FileWriter;
import java.io.IOException;
import com.apicatalog.jsonld.JsonLd;
import com.apicatalog.jsonld.document.Document;
import com.apicatalog.jsonld.document.DocumentParser;
import com.apicatalog.jsonld.http.media.MediaType;
import java.io.StringReader;
import javax.json.Json;
import javax.json.JsonObject;
import javax.json.JsonWriter;
import com.apicatalog.jsonld.api.JsonLdError;
import com.apicatalog.jsonld.api.JsonLdOptions;
/** - read expanded JSON-LD
* - frame with GEOJSON context */
public class GeoJSONexportTest {
static String jsonInputExpanded = "[\n" +
" {\n" +
" \"@id\": \"https://semantic-forms.cc:1953/ldp/1532706288331-48387235120480835\",\n" +
" \"https://purl.org/geojson/vocab#properties\": [\n" +
" {\n" +
" \"@id\": \"f8c50b76-83d0-4cf1-ac6d-ec620eaeb449\"\n" +
" }\n" +
" ],\n" +
" \"https://purl.org/geojson/vocab#geometry\": [\n" +
" {\n" +
" \"@id\": \"e01148c8-2148-4ae4-b6e3-5c941a299ce9\"\n" +
" }\n" +
" ],\n" +
" \"@type\": [\n" +
" \"https://purl.org/geojson/vocab#Feature\"\n" +
" ]\n" +
" },\n" +
" {\n" +
" \"@id\": \"e01148c8-2148-4ae4-b6e3-5c941a299ce9\",\n" +
" \"https://purl.org/geojson/vocab#coordinates\": [\n" +
" {\n" +
" \"@id\": \"a61c31ed-1375-43a5-b875-fb2079213265\"\n" +
" }\n" +
" ],\n" +
" \"@type\": [\n" +
" \"https://purl.org/geojson/vocab#Point\"\n" +
" ]\n" +
" },\n" +
" {\n" +
" \"@id\": \"a61c31ed-1375-43a5-b875-fb2079213265\",\n" +
" \"http://www.w3.org/1999/02/22-rdf-syntax-ns#rest\": [\n" +
" {\n" +
" \"@id\": \"44c4e184-7fdf-48f6-8f97-943623fdcc52\"\n" +
" }\n" +
" ],\n" +
" \"http://www.w3.org/1999/02/22-rdf-syntax-ns#first\": [\n" +
" {\n" +
" \"@value\": \"0.9016695\"\n" +
" }\n" +
" ]\n" +
" },\n" +
" {\n" +
" \"@id\": \"44c4e184-7fdf-48f6-8f97-943623fdcc52\",\n" +
" \"http://www.w3.org/1999/02/22-rdf-syntax-ns#rest\": [\n" +
" {\n" +
" \"@list\": []\n" +
" }\n" +
" ],\n" +
" \"http://www.w3.org/1999/02/22-rdf-syntax-ns#first\": [\n" +
" {\n" +
" \"@value\": \"46.8332179\"\n" +
" }\n" +
" ]\n" +
" }\n" +
"]\n" +
"";
static String jsonInput = jsonInputExpanded;
// From https://geojson.org/geojson-ld/geojson-context.jsonld
static String geojsonContext = "{ \"@context\": {\n" +
" \"geojson\": \"https://purl.org/geojson/vocab#\",\n" +
" \"Feature\": \"geojson:Feature\",\n" +
" \"FeatureCollection\": \"geojson:FeatureCollection\",\n" +
" \"GeometryCollection\": \"geojson:GeometryCollection\",\n" +
" \"LineString\": \"geojson:LineString\",\n" +
" \"MultiLineString\": \"geojson:MultiLineString\",\n" +
" \"MultiPoint\": \"geojson:MultiPoint\",\n" +
" \"MultiPolygon\": \"geojson:MultiPolygon\",\n" +
" \"Point\": \"geojson:Point\",\n" +
" \"Polygon\": \"geojson:Polygon\",\n" +
" \"bbox\": {\n" +
" \"@container\": \"@list\",\n" +
" \"@id\": \"geojson:bbox\"\n" +
" },\n" +
" \"coordinates\": {\n" +
" \"@container\": \"@list\",\n" +
" \"@id\": \"geojson:coordinates\"\n" +
" },\n" +
" \"features\": {\n" +
" \"@container\": \"@set\",\n" +
" \"@id\": \"geojson:features\"\n" +
" },\n" +
" \"geometry\": \"geojson:geometry\",\n" +
" \"id\": \"@id\",\n" +
" \"properties\": \"geojson:properties\",\n" +
" \"type\": \"@type\"\n" +
" }\n" +
" }";
static String fileName = "out.test.geojson";
public static void main(String[] args) throws JsonLdError, IOException {
// String url = "https://geojson.org/geojson-ld/geojson-context.jsonld";
FileWriter fw = new FileWriter(fileName);
JsonLdOptions options = new JsonLdOptions();
options.setUseNativeTypes(true);
options.setOmitGraph(true);
options.setCompactToRelative(true);
options.setUseNativeTypes(true);
Document contextDocument = makeJSONLDdocument(geojsonContext);
Document jsonDoc = makeJSONLDdocument(jsonInput);
JsonObject jsonObject = JsonLd.frame(jsonDoc, contextDocument).options(options).get();
JsonWriter jsonWriter = Json.createWriter(fw);
jsonWriter.writeObject(jsonObject);
jsonWriter.close();
}
static Document makeJSONLDdocument(String src) throws JsonLdError {
StringReader inputStream = new StringReader(src);
return DocumentParser.parse(MediaType.JSON_LD, inputStream);
}
}
from titanium-json-ld.
filip26
commented on August 19, 2024
I'm sorry but I cannot reproduce the issue (tested against latest code base - 0.8.6-SNAPSHOT). The provided test produces the same output as json-ld playground.
from titanium-json-ld.
jmvanel
commented on August 19, 2024
The processing chain here is quite long:
- getting a SPARQL query in Jena TDB, including blank nodes
- converting to Titanium RDF Dataset
- running JsonLd.fromRdf()
- running JsonLd.frame()
and in the end, the JSON array corresponding to RDF list is not present.
I finally found the location of error, in step 3, giving this issue : #118
So I can close the issue :) .
from titanium-json-ld.
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