diff --git a/SubmodelRegistryServiceSpecification/V3.0_SSP-001.yaml b/SubmodelRegistryServiceSpecification/V3.0_SSP-001.yaml
new file mode 100644
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--- /dev/null
+++ b/SubmodelRegistryServiceSpecification/V3.0_SSP-001.yaml
@@ -0,0 +1,190 @@
+openapi: 3.0.3
+info:
+  title: DotAAS Part 2 | HTTP/REST | Submodel Registry Service Specification
+  description: >-
+    The Full Profile of the Submodel Registry Service Specification as part of the [Specification of the Asset Administration Shell: Part 2](http://industrialdigitaltwin.org/en/content-hub).  
+
+    Publisher: Industrial Digital Twin Association (IDTA) April 2023
+  contact:
+    name: Industrial Digital Twin Association (IDTA)
+    email: info@idtwin.org
+  license: 
+    name: CC BY 4.0
+    url: https://creativecommons.org/licenses/by/4.0/
+  version: V3.0.1_SSP-001
+servers:
+- url: '{protocol}://{host_name}:{port}/api/{version_prefix}'
+  variables:
+    protocol:
+      description: 'Allows access through http and https (recommended)'
+      enum:
+        - 'http'   
+        - 'https'
+      default: 'https'
+    host_name:
+      default: admin-shell.io
+      description: 'Hostname of server hosting the api'
+    port:
+      enum:
+        - '80'
+        - '443'
+      default: '443'
+      description: '80 is default for http, 443 for https'
+    version_prefix:
+      enum:
+        - 'v3.0'
+      default: v3.0
+paths:
+  /submodel-descriptors:
+    get:
+      tags:
+        - Submodel Registry API
+      summary: Returns all Submodel Descriptors
+      operationId: GetAllSubmodelDescriptors
+      x-semanticIds:
+        - https://admin-shell.io/aas/API/GetAllSubmodelDescriptors/3/0
+      parameters:
+        - $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/parameters/Limit'
+        - $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/parameters/Cursor'
+      responses:
+        '200':
+          description: Requested Submodel Descriptors
+          content:
+            application/json:
+              schema:
+                $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/schemas/GetSubmodelDescriptorsResult'
+        '400':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/bad-request'
+        '403':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/forbidden'
+        '404':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/not-found'
+        '500':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/internal-server-error'    
+        default:
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/default'
+    post:
+      tags:
+        - Submodel Registry API
+      summary: Creates a new Submodel Descriptor, i.e. registers a submodel
+      operationId: PostSubmodelDescriptor
+      x-semanticIds:
+        - https://admin-shell.io/aas/API/PostSubmodelDescriptor/3/0
+      requestBody:
+        description: Submodel Descriptor object
+        content:
+          application/json:
+            schema:
+              $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/schemas/SubmodelDescriptor'
+        required: true
+      responses:
+        '201':
+          description: Submodel Descriptor created successfully
+          headers:
+            Location:
+              description: URL of the newly created resource
+              schema:
+                type: string
+          content:
+            application/json:
+              schema:
+                $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/schemas/SubmodelDescriptor'
+        '400':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/bad-request'
+        '403':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/forbidden'
+        '409':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/conflict'
+        default:
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/default'
+  /submodel-descriptors/{submodelIdentifier}:
+    parameters:
+      - $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/parameters/SubmodelIdentifier'
+    get:
+      tags:
+        - Submodel Registry API
+      summary: Returns a specific Submodel Descriptor
+      operationId: GetSubmodelDescriptorById
+      x-semanticIds:
+        - https://admin-shell.io/aas/API/GetSubmodelDescriptorById/3/0
+      responses:
+        '200':
+          description: Requested Submodel Descriptor
+          content:
+            application/json:
+              schema:
+                $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/schemas/SubmodelDescriptor'
+        '400':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/bad-request'
+        '403':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/forbidden'
+        '404':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/not-found'
+        '500':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/internal-server-error'    
+        default:
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/default'
+    put:
+      tags:
+        - Submodel Registry API
+      summary: Updates an existing Submodel Descriptor
+      operationId: PutSubmodelDescriptorById
+      x-semanticIds:
+        - https://admin-shell.io/aas/API/PutSubmodelDescriptorById/3/0
+      requestBody:
+        description: Submodel Descriptor object
+        content:
+          application/json:
+            schema:
+              $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/schemas/SubmodelDescriptor'
+        required: true
+      responses:
+        '204':
+          description: Submodel Descriptor updated successfully
+        '400':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/bad-request'
+        '403':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/forbidden'
+        '404':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/not-found'
+        '500':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/internal-server-error'    
+        default:
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/default'
+    delete:
+      tags:
+        - Submodel Registry API
+      summary: Deletes a Submodel Descriptor, i.e. de-registers a submodel
+      operationId: DeleteSubmodelDescriptorById
+      x-semanticIds:
+        - https://admin-shell.io/aas/API/DeleteSubmodelDescriptorById/3/0
+      responses:
+        '204':
+          description: Submodel Descriptor deleted successfully
+        '400':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/bad-request'
+        '403':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/forbidden'
+        '404':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/not-found'
+        '500':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/internal-server-error'
+  /description:
+    get:
+      tags:
+        - Description API
+      summary: Returns the self-describing information of a network resource (ServiceDescription)
+      operationId: GetDescription
+      x-semanticIds:
+        - https://admin-shell.io/aas/API/Descriptor/GetDescription/3/0
+      responses:
+        '200':
+          description: Requested Description
+          content:
+            application/json:
+              schema:
+                $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/schemas/ServiceDescription'
+        '403':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/forbidden' 
+        default:
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/default'
\ No newline at end of file
diff --git a/SubmodelRegistryServiceSpecification/V3.0_SSP-002.yaml b/SubmodelRegistryServiceSpecification/V3.0_SSP-002.yaml
new file mode 100644
index 00000000..af312c03
--- /dev/null
+++ b/SubmodelRegistryServiceSpecification/V3.0_SSP-002.yaml
@@ -0,0 +1,112 @@
+openapi: 3.0.3
+info:
+  title: DotAAS Part 2 | HTTP/REST | Submodel Registry Service Specification
+  description: >-
+    The Read Profile of the Submodel Registry Service Specification as part of the [Specification of the Asset Administration Shell: Part 2](http://industrialdigitaltwin.org/en/content-hub).  
+    
+    Publisher: Industrial Digital Twin Association (IDTA) April 2023
+  contact:
+    name: Industrial Digital Twin Association (IDTA)
+    email: info@idtwin.org
+  license: 
+    name: CC BY 4.0
+    url: https://creativecommons.org/licenses/by/4.0/
+  version: V3.0.1_SSP-002
+servers:
+- url: '{protocol}://{host_name}:{port}/api/{version_prefix}'
+  variables:
+    protocol:
+      description: 'Allows access through http and https (recommended)'
+      enum:
+        - 'http'   
+        - 'https'
+      default: 'https'
+    host_name:
+      default: admin-shell.io
+      description: 'Hostname of server hosting the api'
+    port:
+      enum:
+        - '80'
+        - '443'
+      default: '443'
+      description: '80 is default for http, 443 for https'
+    version_prefix:
+      enum:
+        - 'v3.0'
+      default: v3.0
+paths:
+  /submodel-descriptors:
+    get:
+      tags:
+        - Submodel Registry API
+      summary: Returns all Submodel Descriptors
+      operationId: GetAllSubmodelDescriptors
+      x-semanticIds:
+        - https://admin-shell.io/aas/API/GetAllSubmodelDescriptors/3/0
+      parameters:
+        - $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/parameters/Limit'
+        - $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/parameters/Cursor'
+      responses:
+        '200':
+          description: Requested Submodel Descriptors
+          content:
+            application/json:
+              schema:
+                $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/schemas/GetSubmodelDescriptorsResult'
+        '400':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/bad-request'
+        '403':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/forbidden'
+        '404':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/not-found'
+        '500':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/internal-server-error'    
+        default:
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/default'
+  /submodel-descriptors/{submodelIdentifier}:
+    parameters:
+      - $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/parameters/SubmodelIdentifier'
+    get:
+      tags:
+        - Submodel Registry API
+      summary: Returns a specific Submodel Descriptor
+      operationId: GetSubmodelDescriptorById
+      x-semanticIds:
+        - https://admin-shell.io/aas/API/GetSubmodelDescriptorById/3/0
+      responses:
+        '200':
+          description: Requested Submodel Descriptor
+          content:
+            application/json:
+              schema:
+                $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/schemas/SubmodelDescriptor'
+        '400':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/bad-request'
+        '403':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/forbidden'
+        '404':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/not-found'
+        '500':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/internal-server-error'    
+        default:
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/default'
+          
+  /description:
+    get:
+      tags:
+        - Description API
+      summary: Returns the self-describing information of a network resource (ServiceDescription)
+      operationId: GetDescription
+      x-semanticIds:
+        - https://admin-shell.io/aas/API/Descriptor/GetDescription/3/0
+      responses:
+        '200':
+          description: Requested Description
+          content:
+            application/json:
+              schema:
+                $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/schemas/ServiceDescription'
+        '403':
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/forbidden' 
+        default:
+          $ref: 'https://api.swaggerhub.com/domains/Plattform_i40/Part2-API-Schemas/V3.0.1#/components/responses/default'
\ No newline at end of file