feat: Satisfy gd_req__arch_linkage_safety

docs/internals/requirements/requirements.rst

@@ -715,6 +715,17 @@ Architecture Attributes
   Docs-as-Code shall enforce that valid safety architectural elements (Safety != QM) can
   only be linked against valid safety architectural elements.
 
+.. tool_req:: Check safety architecture view belongs_to a safety parent
+  :id: tool_req__docs_arch_link_safety_belongs_to
+  :tags: Architecture
+  :implemented: YES
+  :version: 1
+  :satisfies: gd_req__arch_linkage_safety
+  :parent_covered: YES
+
+  Enforce that valid ASIL architecture views link only
+  to ASIL architecture elements via ``belongs_to``.
+
 .. tool_req:: Security: Restrict linkage
   :id: tool_req__docs_arch_link_security
   :tags: Architecture

src/extensions/score_metamodel/metamodel.yaml

@@ -1026,6 +1026,18 @@ graph_checks:
       fulfils: safety != QM
     explanation: An QM architecture element cannot implement ASIL requirements.
 
+  # req-Id: tool_req__docs_arch_link_safety_belongs_to
+  tool_req__docs_arch_link_safety_belongs_to:
+    needs:
+      include: feat_arc_sta, feat_arc_dyn, comp_arc_sta, comp_arc_dyn
+      condition:
+        and:
+          - safety != QM
+          - status == valid
+    check:
+      belongs_to: safety != QM
+    explanation: Safety architecture views must belong to safety architecture elements.
+
   # req-Id: tool_req__docs_req_arch_link_safety_to_arch
   tool_req__docs_req_arch_link_safety_to_arch:
     needs:

src/extensions/score_metamodel/tests/rst/graph/test_arch_safety_belongs_to.rst

@@ -0,0 +1,96 @@
+..
+   # *******************************************************************************
+   # Copyright (c) 2025 Contributors to the Eclipse Foundation
+   #
+   # See the NOTICE file(s) distributed with this work for additional
+   # information regarding copyright ownership.
+   #
+   # This program and the accompanying materials are made available under the
+   # terms of the Apache License Version 2.0 which is available at
+   # https://www.apache.org/licenses/LICENSE-2.0
+   #
+   # SPDX-License-Identifier: Apache-2.0
+   # *******************************************************************************
+
+#CHECK: check_metamodel_graph
+
+.. feat:: QM Feature Parent
+   :id: feat__test__qm_parent
+   :safety: QM
+   :security: NO
+   :status: valid
+
+.. feat:: Safety Feature Parent
+   :id: feat__test__asil_parent
+   :safety: ASIL_B
+   :security: NO
+   :status: valid
+
+.. comp:: QM Component Parent
+   :id: comp__test__qm_parent
+   :safety: QM
+   :security: NO
+   :status: valid
+   :belongs_to: feat__test__qm_parent
+
+.. comp:: Safety Component Parent
+   :id: comp__test__asil_parent
+   :safety: ASIL_B
+   :security: NO
+   :status: valid
+   :belongs_to: feat__test__asil_parent
+
+
+.. Negative Test: Safety feat_arc_sta belongs_to a QM feat — should warn.
+#EXPECT: feat_arc_sta__test__safety_to_qm: Parent need `feat__test__qm_parent` does not fulfill condition `safety != QM`.
+
+.. feat_arc_sta:: Safety view with QM parent
+   :id: feat_arc_sta__test__safety_to_qm
+   :safety: ASIL_B
+   :security: NO
+   :status: valid
+   :belongs_to: feat__test__qm_parent
+
+
+.. Positive Test: Safety feat_arc_sta belongs_to a safety feat — should not warn.
+#EXPECT-NOT: Safety architecture views must belong to safety architecture elements
+
+.. feat_arc_sta:: Safety view with safety parent
+   :id: feat_arc_sta__test__safety_to_asil
+   :safety: ASIL_B
+   :security: NO
+   :status: valid
+   :belongs_to: feat__test__asil_parent
+
+
+.. Positive Test: QM feat_arc_sta — check does not apply to QM elements.
+#EXPECT-NOT: Safety architecture views must belong to safety architecture elements
+
+.. feat_arc_sta:: QM view with QM parent
+   :id: feat_arc_sta__test__qm_to_qm
+   :safety: QM
+   :security: NO
+   :status: valid
+   :belongs_to: feat__test__qm_parent
+
+
+.. Negative Test: Safety comp_arc_sta belongs_to a QM comp — should warn.
+#EXPECT: comp_arc_sta__test__safety_to_qm: Parent need `comp__test__qm_parent` does not fulfill condition `safety != QM`.
+
+.. comp_arc_sta:: Safety component view with QM parent
+   :id: comp_arc_sta__test__safety_to_qm
+   :safety: ASIL_B
+   :security: NO
+   :status: valid
+   :belongs_to: comp__test__qm_parent
+
+
+.. Positive Test: Safety comp_arc_sta belongs_to a safety comp — should not warn.
+#EXPECT-NOT: Safety architecture views must belong to safety architecture elements
+
+.. comp_arc_sta:: Safety component view with safety parent
+   :id: comp_arc_sta__test__safety_to_asil
+   :safety: ASIL_B
+   :security: NO
+   :status: valid
+   :belongs_to: comp__test__asil_parent