Introduce new query language (Approach 1)

examples/query_lang/credentials_alternatives.json

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+{
+  "rules": {
+    "required": 2,
+    "from": [
+      { "ref": "pid" },
+      {
+        "required": 1,
+        "from": [
+          { "ref": "pid_reduced" },
+          { "ref": "residence_info" }
+        ]
+      }
+    ]
+  },
+  "credentials": {
+    "pid": {
+      "format": "vc+sd-jwt",
+      "vct_values": ["https://credentials.example.com/identity_credential"],
+      "claims": [
+        { "path": ["given_name"] },
+        { "path": ["family_name"] },
+        { "path": ["address", "street_address"] }
+      ]
+    },
+    "pid_reduced": {
+      "format": "vc+sd-jwt",
+      "vct_values": ["https://credentials.example.com/identity_credential"],
+      "claims": [
+        { "path": ["family_name"] },
+        { "path": ["given_name"] }
+      ]
+    },
+    "residence_info": {
+      "format": "vc+sd-jwt",
+      "vct_values": ["https://credentials.example.com/residence_credential"],
+      "claims": [
+        { "path": ["postal_code"] },
+        { "path": ["locality"] },
+        { "path": ["region"] }
+      ]
+    }
+  }
+}

examples/query_lang/multi_credentials.json

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+{
+    "credentials": {
+        "pid": {
+            "format": "vc+sd-jwt",
+            "vc+sd-jwt": {
+                "vct_values": [ "https://example.com/personal_identity" ]
+            },
+            "claims": [
+                { "path": [ "last_name" ] },
+                { "path": [ "given_name" ] },
+                { "path": [ "address", "street_address" ] }
+            ]
+        },
+        "degree": {
+            "format": "vc+sd-jwt",
+            "vc+sd-jwt": {
+                "vct_values": [ "https://example.com/education_credential" ]
+            },
+            "claims": [
+                { "path": [ "family_name" ] },
+                { "path": [ "given_name" ] },
+                { "path": [ "degree" ] }
+            ]
+        },
+        "residence": {
+            "format": "vc+sd-jwt",
+            "vc+sd-jwt": {
+                "vct_values": [ "https://example.com/residence_proof" ]
+            },
+            "claims": [
+                { "path": [ "family_name" ] },
+                { "path": [ "given_name" ] },
+                { "path": [ "locality" ] },
+                { "path": [ "region" ] }
+            ]
+        }
+    }
+}

examples/query_lang/nested_claim_queries.json

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+{
+  "credentials": {
+    "my_cred_1": {
+      "format": "vc+sd-jwt",
+      "vc+sd-jwt": {
+        "vct_values": [ "https://credentials.example.com/identity_credential" ],
+        "alg_values": [ "ES256", "ES384" ],
+        "sd_alg_values": [ "SHA-256" ]
+      },
+      "claims": [
+        { "path": [ "last_name" ] },
+        {
+          "required": 1,
+          "from": [
+            { "path": [ "postal_code" ] },
+            {
+              "required": 2,
+              "from": [
+                { "path": [ "locality" ] },
+                { "path": [ "region" ] }
+              ]
+            }
+          ]
+        }
+      ]
+    }
+  }
+}

examples/query_lang/simple.json

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+{
+  "credentials": {
+    "my_cred_1": {
+      "format": "vc+sd-jwt",
+      "vc+sd-jwt": {
+        "vct_values": [ "https://credentials.example.com/identity_credential" ],
+        "alg_values": ["ES256", "ES384"],
+        "sd_alg_values": ["SHA-256"]
+      },
+      "claims":[
+        { "path": ["family_name"] },
+        { "path": ["given_name"] },
+        { "path": ["address", "street_address"] }
+      ]
+    }
+  }
+}

examples/query_lang/simple_mdoc.json

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+{
+  "credentials": {
+    "my_mdoc_credential": {
+      "format": "mso_mdoc",
+      "mso_mdoc": {
+        "doctype_values": "org.iso.7367.1.mVR",
+        "alg_values": [ "EdDSA" ],
+        "hash_algorithm_values": [ "SHA-384"]
+      },
+      "claims": [
+        {
+          "namespace": "org.iso.7367.1",
+          "claim_name": "vehicle_holder"
+        },
+        {
+          "namespace": "org.iso.18013.5.1",
+          "claim_name": "first_name"
+        }
+      ]
+    }
+  }
+}