Referencing json-ld @context

Use Solid Solid: The Basics
1

imagine i have a following markup(respec/bikeshed like):

<spec-statement id="payload-context-uri"> A Payload document serialized as application/ld+json MUST include "@context": "https://ujg.specs.openuji.org/ed/context.jsonld". </spec-statement> 

<spec-statement id="context-definition"> The JSON-LD context document identified by https://ujg.specs.openuji.org/ed/context.jsonld MUST be equivalent to the JSON-LD context defined in [=jsonld-context=]. </spec-statement> 

<def id="jsonld-context" as="pre" lang="jsonld"> { "@context": { 

 "@version": 1.1,
 "@vocab": "https://ujg.specs.openuji.org/ed/ns/core#",

 "specVersion": "https://ujg.specs.openuji.org/ed/ns/core#specVersion",
 "imports": {
 "@id": "https://ujg.specs.openuji.org/ed/ns/core#documentImports",
 "@type": "@id",
 "@container": "@set"
 },
 "nodes": {
 "@id": "https://ujg.specs.openuji.org/ed/ns/core#documentNodes",
 "@container": "@set"
 }

} } </def>

a resulting json-ld describing this as knowledge graph would be:

 {
“@context”: {
“dct”: “http://purl.org/dc/terms/”,
“spec”: “http://www.w3.org/ns/spec#”,
“skos”: “http://www.w3.org/2004/02/skos/core#”,
“jsonld”: “http://www.w3.org/ns/json-ld#”,
“id”: “@id”,
“type”: “@type”
},
“@graph”: [
{
“id”: “https://ujg.specs.openuji.org/ed/”,
“type”: “spec:Specification”,
“dct:title”: “UJG Editor’s Draft”,
“spec:requirement”: [
{ “id”: “https://ujg.specs.openuji.org/ed/#payload-context-uri” },
{ “id”: “https://ujg.specs.openuji.org/ed/#context-definition” }
]
},

{
  "id": "https://ujg.specs.openuji.org/ed/#jsonld-context",
  "type": "skos:Concept",
  "skos:prefLabel": "Payload document",
  "jsonld:context": {
    "id": "https://ujg.specs.openuji.org/ed/context.jsonld"
  }
},

{
  "id": "https://ujg.specs.openuji.org/ed/#payload-context-uri",
  "type": "spec:Requirement",
  "spec:requirementSubject": {
    "id": "https://ujg.specs.openuji.org/ed/#jsonld-context"
  },
  "spec:requirementLevel": { "id": "spec:MUST" },
  "spec:statement": "A Payload document serialized as application/ld+json MUST include \"@context\": \"https://ujg.specs.openuji.org/ed/context.jsonld\"."
},

{
  "id": "https://ujg.specs.openuji.org/ed/#context-definition",
  "type": "spec:Requirement",
  "spec:requirementLevel": { "id": "spec:MUST" },
  "spec:statement": "The JSON-LD context document identified by https://ujg.specs.openuji.org/ed/context.jsonld MUST be equivalent to the JSON-LD context defined in #jsonld-context."
},

{
  "id": "https://ujg.specs.openuji.org/ed/context.jsonld",
  "type": "jsonld:Context",
  "jsonld:version": 1.1,
  "jsonld:vocab": "https://ujg.specs.openuji.org/ed/ns/core#",
  "jsonld:definition": [
    {
      "type": "jsonld:TermDefinition",
      "jsonld:term": "specVersion",
      "jsonld:id": "https://ujg.specs.openuji.org/ed/ns/core#specVersion"
    },
    {
      "type": "jsonld:TermDefinition",
      "jsonld:term": "imports",
      "jsonld:id": "https://ujg.specs.openuji.org/ed/ns/core#documentImports",
      "jsonld:type": "@id",
      "jsonld:container": "jsonld:setContainerType"
    },
    {
      "type": "jsonld:TermDefinition",
      "jsonld:term": "nodes",
      "jsonld:id": "https://ujg.specs.openuji.org/ed/ns/core#documentNodes",
      "jsonld:container": "jsonld:setContainerType"
    }
  ]
}

]
}

is it true? or am i missing smth.