Insert multiple subjects

{
  "@graph": [
    {
      "@id": "fred",
      "name": "Fred"
    },
    {
      "@id": "wilma",
      "name": "Wilma"
    }
  ]
}

Delete all properties of subject fred and all properties of other subjects that reference it

{
  "@delete": [
    { "@id": "fred", "?prop1": "?value" },
    { "@id": "?id2", "?ref": { "@id": "fred" } }
  ],
  "@where": {
    "@union": [
      { "@id": "fred", "?prop1": "?value" },
      { "@id": "?id2", "?ref": { "@id": "fred" } }
    ]
  }
}

Note that when used in a @where clause, a plain array can substitute for a Group, as follows:

Select combinations of subjects having a common property value

{
  "@select": ["id1", "id2"],
  "@where": {
    "@graph": [
      { "@id": "id1", "name": "?name" },
      { "@id": "id2", "name": "?name" }
    ]
  }
}

is equivalent to:

{
  "@select": ["id1", "id2"],
  "@where": [
    { "@id": "id1", "name": "?name" },
    { "@id": "id2", "name": "?name" }
  ]
}

see

json-rql group