feat(metadata): JSON-LD-Export/Import + Sidecar (PR3/4)#39
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Macht Metadaten maschinenlesbar/vollqualifizierend als selbstbeschreibendes JSON-LD (Linked Data) und ablegbar als Sidecar neben dem Datenblob. sdata/semantic.py (pure-Python): - to_jsonld(metadata): @id = did:suuid:<sname>:sdata, @type = [sdata:<Klasse>, BFO-IRI der Topologieklasse], reservierte _sdata_*-Felder -> schema.org/DCAT/ PROV-Terme (name/identifier/generatedAtTime/wasDerivedFrom/isPartOf/…). Hybrid-Attributmodell: einheitenbehaftet -> qudt:Quantity-Knoten (value+unit), unit-los+ontology -> getypter Knoten, sonst typisiertes Literal. ontology ist stets @type/Klasse des Werts; Prädikat = sdata:<name>. - from_jsonld(): Round-Trip zurück zu Metadata (dtype via XSD bzw. JSON-Typ für list/json; Provenienz-DIDs -> snames). - write_sidecar()/read_sidecar(): <sname>.meta.jsonld (Verzeichnis oder Datei). Additive Delegatoren auf Metadata (to_jsonld/from_jsonld/write_sidecar/ read_sidecar) und Base (to_jsonld/write_sidecar/read_sidecar) via lazy import. Keine Default-Verhaltensänderung, keine Pflicht-Dependency. Tests: tests/test_semantic_jsonld.py (Struktur, Round-Trip inkl. bytes/list/json, Provenienz, Sidecar). Coverage 100%.
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Kern-PR der Maschinenlesbarkeit: Metadaten als selbstbeschreibendes JSON-LD (Linked Data) — und als Sidecar neben dem Datenblob ablegbar.
sdata/semantic.py(pure-Python)to_jsonld(metadata):@id=did:suuid:<sname>:sdata;@type=[sdata:<Klasse>, <BFO-IRI>]; reservierte_sdata_*→ schema.org/DCAT/PROV (name/identifier/generatedAtTime/wasDerivedFrom/isPartOf/…).Hybrid-Attributmodell: einheitenbehaftet →
qudt:Quantity-Knoten; unit-los +ontology→ getypter Knoten; sonst typisiertes Literal.ontology=@type/Klasse; Prädikat =sdata:<name>.from_jsonld(): verlustarmer Round-Trip (dtype via XSD bzw. JSON-Typ für list/json; Provenienz-DIDs → snames).write_sidecar()/read_sidecar():<sname>.meta.jsonld(Verzeichnis oder Datei).Beispiel
{ "@id": "did:suuid:Base__specimen_01__…:sdata", "@type": ["sdata:Base", "bfo:BFO_0000004"], "name": "specimen_01", "sdata:force_x": {"@type":"qudt:Quantity","value":{"@value":12.5,"@type":"xsd:double"}, "unitRef":"unit:KiloN","symbol":"kN"}, "sdata:material_id": {"@value":"DP800","@type":"xsd:string"}, "sdata:phase": {"@type":"bfo:Quality","value":{"@value":"martensite","@type":"xsd:string"}} }Kompatibilität & Tests
Additive Delegatoren auf
Metadata/Base(lazy import); keine Default-Verhaltensänderung, keine Pflicht-Dependency. 437 passed, 8 skipped, Coverage 100 %.