diff --git a/doc/api-details.md b/doc/api-details.md
index a400d5e4..4cc2d7e8 100644
--- a/doc/api-details.md
+++ b/doc/api-details.md
@@ -82,13 +82,18 @@ Another way of creating users is to use `kci user add` tool from kernelci-core.
 
 ## Nodes
 
-As a proof-of-concept, an object model called `Node` is defined in this API.
-It's possible to create new objects and retrieve them via the API.
+`Node` objects form the basis of the API models to represent tests runs,
+kernel builds, regressions and other test-related entities and their
+relationships. See [the model definitions in
+kernelci-core](https://github.com/kernelci/kernelci-core/blob/main/kernelci/api/models.py)
+for details on the `Node` model and its subtypes. It's possible to
+create new objects and retrieve them via the API.
 
 ### Create a Node
 
-To create an object of `Node` model, a `POST` request should be made along with
-the Node attributes. This requires an authentication token:
+To create a `Node` or a `Node` subtype object, for instance, a
+`Checkout` node, a `POST` request should be made along with the Node
+attributes. This requires an authentication token:
 
 ```
 $ curl -X 'POST' \
@@ -97,14 +102,48 @@ $ curl -X 'POST' \
   -H 'Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiJib2IifQ.ci1smeJeuX779PptTkuaG1SEdkp5M1S1AgYvX8VdB20' \
   -H 'Content-Type: application/json' \
   -d '{
-  "name":"checkout",
-  "revision":{"tree":"mainline",
-  "url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git",
-  "branch":"master",
-  "commit":"2a987e65025e2b79c6d453b78cb5985ac6e5eb26",
-  "describe":"v5.16-rc4-31-g2a987e65025e"}
-}'
-{"_id":"61bda8f2eb1a63d2b7152418","kind":"node","name":"checkout","revision":{"tree":"mainline","url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git","branch":"master","commit":"2a987e65025e2b79c6d453b78cb5985ac6e5eb26","describe":"v5.16-rc4-31-g2a987e65025e"},"parent":null,"status":"pending","result":null, "created":"2022-02-02T11:23:03.157648", "updated":"2022-02-02T11:23:03.157648"}
+    "name": "checkout",
+    "kind": "checkout",
+    "path": ["checkout"],
+    "data": {
+      "kernel_revision": {
+        "tree": "mainline",
+        "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git",
+        "branch": "master",
+        "commit": "2a987e65025e2b79c6d453b78cb5985ac6e5eb26",
+        "describe": "v5.16-rc4-31-g2a987e65025e"
+      }
+    }
+  }' | jq
+
+{
+  "id": "61bda8f2eb1a63d2b7152418",
+  "kind": "checkout",
+  "name": "checkout",
+  "path": [
+    "checkout"
+  ],
+  "group": null,
+  "parent": null,
+  "state": "running",
+  "result": null,
+  "artifacts": null,
+  "data": {
+    "kernel_revision": {
+      "tree": "mainline",
+      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git",
+      "branch": "master",
+      "commit": "2a987e65025e2b79c6d453b78cb5985ac6e5eb26",
+      "describe": "v5.16-rc4-31-g2a987e65025e"
+    }
+  },
+  "created": "2024-02-01T09:58:28.479138",
+  "updated": "2024-02-01T09:58:28.479142",
+  "timeout": "2024-02-01T15:58:28.479145",
+  "holdoff": null,
+  "owner": "admin",
+  "user_groups": []
+}
 ```
 
 ### Getting Nodes back
@@ -114,15 +153,118 @@ Reading Node doesn't require authentication, so plain URLs can be used.
 To get node by ID, use `/node` endpoint with node ID as a path parameter:
 
 ```
-$ curl http://localhost:8001/latest/node/61bda8f2eb1a63d2b7152418
-{"_id":"61bda8f2eb1a63d2b7152418","kind":"node","name":"checkout","revision":{"tree":"mainline","url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git","branch":"master","commit":"2a987e65025e2b79c6d453b78cb5985ac6e5eb26","describe":"v5.16-rc4-31-g2a987e65025e"},"parent":null,"status":"pending","result":null, "created":"2022-02-02T11:23:03.157648", "updated":"2022-02-02T11:23:03.157648"}
+$ curl http://localhost:8001/latest/node/61bda8f2eb1a63d2b7152418 | jq
+
+{
+  "id": "61bda8f2eb1a63d2b7152418",
+  "kind": "checkout",
+  "name": "checkout",
+  "path": [
+    "checkout"
+  ],
+  "group": null,
+  "parent": null,
+  "state": "running",
+  "result": null,
+  "artifacts": null,
+  "data": {
+    "kernel_revision": {
+      "tree": "mainline",
+      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git",
+      "branch": "master",
+      "commit": "2a987e65025e2b79c6d453b78cb5985ac6e5eb26",
+      "describe": "v5.16-rc4-31-g2a987e65025e"
+    }
+  },
+  "created": "2024-02-01T09:58:28.479000",
+  "updated": "2024-02-01T09:58:28.479000",
+  "timeout": "2024-02-01T15:58:28.479000",
+  "holdoff": null,
+  "owner": "admin",
+  "user_groups": []
+}
 ```
 
 To get all the nodes as a list, use the `/nodes` API endpoint:
 
 ```
 $ curl http://localhost:8001/latest/nodes
-[{"_id":"61b052199bca2a448fe49673","kind":"node","name":"checkout","revision":{"tree":"mainline","url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git","branch":"master","commit":"2a987e65025e2b79c6d453b78cb5985ac6e5eb26","describe":"v5.16-rc4-31-g2a987e65025e"},"parent":null,"status":"pending","result":null, "created":"2022-02-01T11:23:03.157648", "updated":"2022-02-02T11:23:03.157648"},{"_id":"61b052199bca2a448fe49674","kind":"node","name":"check-describe","revision":{"tree":"mainline","url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git","branch":"master","commit":"2a987e65025e2b79c6d453b78cb5985ac6e5eb26","describe":"v5.16-rc4-31-g2a987e65025e"},"parent":"61b052199bca2a448fe49673","status":"pending", "result":null,"created":"2022-01-02T10:23:03.157648", "updated":"2022-01-02T11:23:03.157648"}]
+{
+  "items": [
+    {
+      "id": "65a1355ee98651d0fe81e412",
+      "kind": "node",
+      "name": "time_test_cases",
+      "path": [
+        "checkout",
+        "kunit-x86_64",
+        "exec",
+        "time_test_cases"
+      ],
+      "group": "kunit-x86_64",
+      "parent": "65a1355ee98651d0fe81e40f",
+      "state": "done",
+      "result": null,
+      "artifacts": null,
+      "data": {
+        "kernel_revision": {
+          "tree": "mainline",
+          "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git",
+          "branch": "master",
+          "commit": "70d201a40823acba23899342d62bc2644051ad2e",
+          "describe": "v6.7-6264-g70d201a40823",
+          "version": {
+            "version": "6",
+            "patchlevel": "7",
+            "extra": "-6264-g70d201a40823"
+          }
+        }
+      },
+      "created": "2024-01-12T12:49:33.996000",
+      "updated": "2024-01-12T12:49:33.996000",
+      "timeout": "2024-01-12T18:49:33.996000",
+      "holdoff": null,
+      "owner": "admin",
+      "user_groups": []
+    },
+    {
+      "id": "65a1355ee98651d0fe81e413",
+      "kind": "node",
+      "name": "time64_to_tm_test_date_range",
+      "path": [
+        "checkout",
+        "kunit-x86_64",
+        "exec",
+        "time_test_cases",
+        "time64_to_tm_test_date_range"
+      ],
+      "group": "kunit-x86_64",
+      "parent": "65a1355ee98651d0fe81e412",
+      "state": "done",
+      "result": "pass",
+      "artifacts": null,
+      "data": {
+        "kernel_revision": {
+          "tree": "mainline",
+          "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git",
+          "branch": "master",
+          "commit": "70d201a40823acba23899342d62bc2644051ad2e",
+          "describe": "v6.7-6264-g70d201a40823",
+          "version": {
+            "version": "6",
+            "patchlevel": "7",
+            "extra": "-6264-g70d201a40823"
+          }
+        }
+      },
+      "created": "2024-01-12T12:49:33.996000",
+      "updated": "2024-01-12T12:49:33.996000",
+      "timeout": "2024-01-12T18:49:33.996000",
+      "holdoff": null,
+      "owner": "admin",
+      "user_groups": []
+    },
+    ...
 ```
 
 To get nodes by providing attributes, use `/nodes` endpoint with query
@@ -130,26 +272,110 @@ parameters. All the attributes except node ID can be passed to this endpoint.
 In case of ID, please use `/node` endpoint with node ID as described above.
 
 ```
-$ curl 'http://localhost:8001/latest/nodes?name=checkout&revision.tree=mainline'
-[{"_id":"61b052199bca2a448fe49673","kind":"node","name":"checkout","revision":{"tree":"mainline","url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git","branch":"master","commit":"2a987e65025e2b79c6d453b78cb5985ac6e5eb26","describe":"v5.16-rc4-31-g2a987e65025e"},"parent":null,"status":"pending","result":null, "created":"2022-02-01T11:23:03.157648", "updated":"2022-02-02T11:23:03.157648"}]
+$ curl 'http://localhost:8001/latest/nodes?kind=checkout&data.kernel_revision.tree=mainline' | jq
+
+{
+  "items": [
+    {
+      "id": "65a3982ee98651d0fe82b010",
+      "kind": "checkout",
+      "name": "checkout",
+      "path": [
+        "checkout"
+      ],
+      "group": null,
+      "parent": null,
+      "state": "done",
+      "result": null,
+      "artifacts": {
+        "tarball": "https://kciapistagingstorage1.file.core.windows.net/staging/linux-mainline-master-v6.7-9928-g052d534373b7.tar.gz?sv=2022-11-02&ss=f&srt=sco&sp=r&se=2024-10-17T19:19:12Z&st=2023-10-17T11:19:12Z&spr=https&sig=sLmFlvZHXRrZsSGubsDUIvTiv%2BtzgDq6vALfkrtWnv8%3D"
+      },
+      "data": {
+        "kernel_revision": {
+          "tree": "mainline",
+          "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git",
+          "branch": "master",
+          "commit": "052d534373b7ed33712a63d5e17b2b6cdbce84fd",
+          "describe": "v6.7-9928-g052d534373b7",
+          "version": {
+            "version": "6",
+            "patchlevel": "7",
+            "extra": "-9928-g052d534373b7"
+          }
+        }
+      },
+      "created": "2024-01-14T08:15:42.454000",
+      "updated": "2024-01-14T09:16:47.689000",
+      "timeout": "2024-01-14T09:15:42.344000",
+      "holdoff": "2024-01-14T08:46:39.040000",
+      "owner": "admin",
+      "user_groups": []
+    },
+    {
+      "id": "65a3a545e98651d0fe82b4ed",
+      "kind": "checkout",
+      "name": "checkout",
+      "path": [
+        "checkout"
+      ],
+      "group": null,
+      "parent": null,
+      "state": "done",
+      "result": null,
+      "artifacts": {
+        "tarball": "https://kciapistagingstorage1.file.core.windows.net/staging/linux-mainline-master-v6.7-9928-g052d534373b7.tar.gz?sv=2022-11-02&ss=f&srt=sco&sp=r&se=2024-10-17T19:19:12Z&st=2023-10-17T11:19:12Z&spr=https&sig=sLmFlvZHXRrZsSGubsDUIvTiv%2BtzgDq6vALfkrtWnv8%3D"
+      },
+      "data": {
+        "kernel_revision": {
+          "tree": "mainline",
+          "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git",
+          "branch": "master",
+          "commit": "052d534373b7ed33712a63d5e17b2b6cdbce84fd",
+          "describe": "v6.7-9928-g052d534373b7",
+          "version": {
+            "version": "6",
+            "patchlevel": "7",
+            "extra": "-9928-g052d534373b7"
+          }
+        }
+      },
+      "created": "2024-01-14T09:11:33.029000",
+      "updated": "2024-01-14T10:11:48.092000",
+      "timeout": "2024-01-14T10:11:32.922000",
+      "holdoff": "2024-01-14T09:40:19.284000",
+      "owner": "admin",
+      "user_groups": []
+    }
+    ...
 ```
 
 Attributes along with comparison operators are also supported for the
-`/nodes` endpoint. The attribute name and operator should be separated by `__` i.e. `attribute__operator`. Supported operators are `lt`(less than), `gt`(greater than), `lte`(less than or equal to), and `gte`(greater than or equal to).
+`/nodes` endpoint. The attribute name and operator should be separated
+by `__` i.e. `attribute__operator`. Supported operators are `lt`(less
+than), `gt`(greater than), `lte`(less than or equal to), `gte`(greater
+than or equal to) and `re` (regular expression matching).
 
 ```
-$ curl 'http://localhost:8001/latest/nodes?name=checkout&created__gt=2022-12-06T04:59:08.102000'
-{"items":[{"_id":"638ecc1c749a8d1209b758af","kind":"node","name":"checkout","path":["checkout"],"group":null,"revision":{"tree":"mainline","url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git","branch":"master","commit":"bce9332220bd677d83b19d21502776ad555a0e73","describe":"v6.1-rc8-3-gbce9332220bd","version":{"version":6,"patchlevel":1,"sublevel":null,"extra":"-rc8-3-gbce9332220bd","name":null}},"parent":null,"state":"done","result":"pass","artifacts":{"tarball":"http://172.17.0.1:8002/linux-mainline-master-v6.1-rc8-3-gbce9332220bd.tar.gz"},"created":"2022-12-06T04:59:08.959000","updated":"2022-12-06T05:11:33.098000","timeout":"2022-12-07T04:59:08.959000","holdoff":"2022-12-06T05:11:30.873000"}],"total":1,"limit":50,"offset":0}
+$ curl 'http://localhost:8001/latest/nodes?kind=checkout&created__gt=2022-12-06T04:59:08.102000'
 ```
 
 > **Note** In order to support comparison operators in URL request parameters, models can not contain `__` in the field name.
 
+Additionally, the `re` operator offers some basic regular expression
+matching capabilities for query parameters. For instance:
+
+```
+$ curl 'http://localhost:8001/latest/nodes?kind=kbuild&name__re=x86'
+```
+
+returns all Kbuild nodes with the string "x86" in the node name.
+
 Nodes with `null` fields can also be retrieved using the endpoint.
 For example, the below command will get all the nodes with `parent` field set to `null`:
 
 ```
 $ curl 'http://localhost:8001/latest/nodes?parent=null'
-"items":[{"_id":"63c549319fb3b62c7626e7f9","kind":"node","name":"checkout","path":["checkout"],"group":null,"revision":{"tree":"kernelci","url":"https://github.com/kernelci/linux.git","branch":"staging-mainline","commit":"1385303d0d85c68473d8901d69c7153b03a3150b","describe":"staging-mainline-20230115.1","version":{"version":6,"patchlevel":2,"sublevel":null,"extra":"-rc4-2-g1385303d0d85","name":null}},"parent":null,"state":"available","result":null,"artifacts":{"tarball":"http://172.17.0.1:8002/linux-kernelci-staging-mainline-staging-mainline-20230115.1.tar.gz"},"created":"2023-01-16T12:55:13.879000","updated":"2023-01-16T12:55:51.780000","timeout":"2023-01-16T13:55:13.877000","holdoff":"2023-01-16T13:05:51.776000"},{"_id":"63c549329fb3b62c7626e7fa","kind":"node","name":"checkout","path":["checkout"],"group":null,"revision":{"tree":"kernelci","url":"https://github.com/kernelci/linux.git","branch":"staging-next","commit":"39384a5d7e2eb2f28039a92c022aed886a675fbf","describe":"staging-next-20230116.0","version":{"version":6,"patchlevel":2,"sublevel":null,"extra":"-rc4-5011-g39384a5d7e2e","name":null}},"parent":null,"state":"available","result":null,"artifacts":{"tarball":"http://172.17.0.1:8002/linux-kernelci-staging-next-staging-next-20230116.0.tar.gz"},"created":"2023-01-16T12:55:14.706000","updated":"2023-01-16T12:56:30.886000","timeout":"2023-01-16T13:55:14.703000","holdoff":"2023-01-16T13:06:30.882000"}],"total":2,"limit":50,"offset":0}
+"items":[{"_id":"63c549319fb3b62c7626e7f9","kind":"node","name":"checkout","path":["checkout"],"group":null,"data":{"kernel_revision":{"tree":"kernelci","url":"https://github.com/kernelci/linux.git","branch":"staging-mainline","commit":"1385303d0d85c68473d8901d69c7153b03a3150b","describe":"staging-mainline-20230115.1","version":{"version":6,"patchlevel":2,"sublevel":null,"extra":"-rc4-2-g1385303d0d85","name":null}}},"parent":null,"state":"available","result":null,"artifacts":{"tarball":"http://172.17.0.1:8002/linux-kernelci-staging-mainline-staging-mainline-20230115.1.tar.gz"},"created":"2023-01-16T12:55:13.879000","updated":"2023-01-16T12:55:51.780000","timeout":"2023-01-16T13:55:13.877000","holdoff":"2023-01-16T13:05:51.776000"},{"_id":"63c549329fb3b62c7626e7fa","kind":"node","name":"checkout","path":["checkout"],"group":null,"data":{"kernel_revision":{"tree":"kernelci","url":"https://github.com/kernelci/linux.git","branch":"staging-next","commit":"39384a5d7e2eb2f28039a92c022aed886a675fbf","describe":"staging-next-20230116.0","version":{"version":6,"patchlevel":2,"sublevel":null,"extra":"-rc4-5011-g39384a5d7e2e","name":null}}},"parent":null,"state":"available","result":null,"artifacts":{"tarball":"http://172.17.0.1:8002/linux-kernelci-staging-next-staging-next-20230116.0.tar.gz"},"created":"2023-01-16T12:55:14.706000","updated":"2023-01-16T12:56:30.886000","timeout":"2023-01-16T13:55:14.703000","holdoff":"2023-01-16T13:06:30.882000"}],"total":2,"limit":50,"offset":0}
 ```
 
 Please make sure that the query parameter provided with the `null` value in the request exists in the `Node` schema. Otherwise, the API will behave unexpectedly and return all the nodes.
@@ -167,14 +393,18 @@ $ curl -X 'PUT' \
   -H 'Content-Type: application/json' \
   -d '{
   "name":"checkout-test",
-  "revision":{"tree":"mainline",
-  "url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git",
-  "branch":"master",
-  "commit":"2a987e65025e2b79c6d453b78cb5985ac6e5eb26",
-  "describe":"v5.16-rc4-31-g2a987e65025e"},
+  "data":{
+    "kernel_revision":{
+      "tree":"mainline",
+      "url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git",
+      "branch":"master",
+      "commit":"2a987e65025e2b79c6d453b78cb5985ac6e5eb26",
+      "describe":"v5.16-rc4-31-g2a987e65025e"
+    },
+  },
   "created":"2022-02-02T11:23:03.157648"
 }'
-{"_id":"61bda8f2eb1a63d2b7152418","kind":"node","name":"checkout-test","revision":{"tree":"mainline","url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git","branch":"master","commit":"2a987e65025e2b79c6d453b78cb5985ac6e5eb26","describe":"v5.16-rc4-31-g2a987e65025e"},"parent":null,"status":"pending","result":null, "created":"2022-02-02T11:23:03.157648", "updated":"2022-02-02T12:23:03.157648"}
+{"id":"61bda8f2eb1a63d2b7152418","kind":"node","name":"checkout-test","data":{"kernel_revision":{"tree":"mainline","url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git","branch":"master","commit":"2a987e65025e2b79c6d453b78cb5985ac6e5eb26","describe":"v5.16-rc4-31-g2a987e65025e"}},"parent":null,"status":"pending","result":null, "created":"2022-02-02T11:23:03.157648", "updated":"2022-02-02T12:23:03.157648"}
 ```
 
 ### Getting Nodes count
@@ -190,7 +420,7 @@ To get count of nodes matching provided attributes, use `/count` endpoint with q
 ```
 $ curl http://localhost:8001/latest/count?name=checkout
 3
-$ curl http://localhost:8001/latest/count?revision.branch=staging-mainline
+$ curl http://localhost:8001/latest/count?data.kernel_revision.branch=staging-mainline
 1
 ```