Show anchor usage

d3fend.yaml

from rdflib import Graph
import yaml

d = yaml.safe_load(Path("d3fend.yaml").read_text())
g=Graph()
g.parse(data=json.dumps(d), format="application/ld+json")
print(g.serialize(format="application/ld+json"))
---

"@context":
  "@vocab": &d3fend "http://d3fend.mitre.org/ontologies/d3fend.owl#"
  "@base": *d3fend
  owl: "http://www.w3.org/2002/07/owl#"
  rdfs: "http://www.w3.org/2000/01/rdf-schema#"
"@graph":
- '@id': ApplicationHardening
  '@type': &defensiveTechniqueClassess  # Anchor this list
  - DefensiveTechnique
  - owl:Class
  - owl:NamedIndividual
  d3fend-id:
  - '@value': D3-AH
  definition:
  - '@value': |-
      Application Hardening makes an executable application more resilient
      to a class of exploits which either introduce new code or execute unwanted existing
      code. These techniques may be applied at compile-time or on an application binary.
  enables:
  - &harden  # Anchor this object
    '@id': Harden
  rdfs:label:
  - '@value': Application Hardening
  rdfs:subClassOf:
  - '@id': DefensiveTechnique
- &enables-harden-restriction
  '@type':
  - owl:Restriction
  owl:onProperty:
  - '@id': enables
  owl:someValuesFrom:
  - *harden

- '@id': :PlatformHardening
  '@type': *defensiveTechniqueClassess  # reference to the above list
  d3fend-id:
  - '@value': D3-PH
  definition:
  - '@value': Platform Hardening ...
  enables:
  - *harden
  rdfs:label:
  - '@value': Platform Hardening
  rdfs:subClassOf:
  - '@id': DefensiveTechnique
  - *enables-harden-restriction  # Reference anchor