diff --git a/sandbox/vdi/2658/1/0/MTPSUCLib/CommunicationSet/README.md b/sandbox/vdi/2658/1/0/MTPSUCLib/CommunicationSet/README.md
new file mode 100644
index 0000000..741988b
--- /dev/null
+++ b/sandbox/vdi/2658/1/0/MTPSUCLib/CommunicationSet/README.md
@@ -0,0 +1,20 @@
+# VDI/VDE/NAMUR 2658 MTP (Module Type Package) Version 1.0
+This sub-namespace collects the identifiers defined in the VDI specification VDI/VDE/NAMUR 2658.
+
+This folder collects the MTP System Unit Class Library (MTPSUCLib)-based identifiers that are defined by MTP
+and present within the mtp files.
+
+## Introduction
+
+MTP standardizes automation aspects of modular plants used in process industries.
+
+## Status: `Submitted`
+
+
+## SourceList (Submodel Element Collection)
+
+[https://admin-shell.io/sandbox/vdi/2658/1/0/MTPSUCLib/CommunicationSet/SourceList](https://admin-shell.io/sandbox/vdi/2658/1/0/MTPSUCLib/CommunicationSet/SourceList): Collection to organize communication sources of a PEA
+
+## Contact
+
+This sub-namespace is proposed by [Sten Grüner](https://github.com/StenGruener).
diff --git a/sandbox/vdi/2658/1/0/MTPSUCLib/README.md b/sandbox/vdi/2658/1/0/MTPSUCLib/README.md
index 59a035e..dd48ec6 100644
--- a/sandbox/vdi/2658/1/0/MTPSUCLib/README.md
+++ b/sandbox/vdi/2658/1/0/MTPSUCLib/README.md
@@ -13,12 +13,12 @@ MTP standardizes automation aspects of modular plants used in process industries
 
 ## ModuleTypePackage (Submodel Element - File)
 
-MTP file included as a zipped package with ending “.zip” or “.mtp” (.mtp is preferred)
+[https://admin-shell.io/sandbox/vdi/2658/1/0/MTPSUCLib/ModuleTypePackage](https://admin-shell.io/sandbox/vdi/2658/1/0/MTPSUCLib/ModuleTypePackage): MTP file included as a zipped package with ending “.zip” or “.mtp” (.mtp is preferred)
 
-## CommunicationSet/SourceList (Submodel Element Collection)
+## CommunicationSet (`TODO`)
 
-Collection to organize communication sources of a PEA
+[https://admin-shell.io/sandbox/vdi/2658/1/0/MTPSUCLib/CommunicationSet](https://admin-shell.io/sandbox/vdi/2658/1/0/MTPSUCLib/CommunicationSet): `TODO`
 
 ## Contact
 
-This sub-namespace is proposed by [Sten Grüner](https://github.com/StenGruener).
\ No newline at end of file
+This sub-namespace is proposed by [Sten Grüner](https://github.com/StenGruener).
diff --git a/sandbox/vdi/2658/1/0/PEASubmodel/README.md b/sandbox/vdi/2658/1/0/PEASubmodel/README.md
index 5e59ada..4179db3 100644
--- a/sandbox/vdi/2658/1/0/PEASubmodel/README.md
+++ b/sandbox/vdi/2658/1/0/PEASubmodel/README.md
@@ -12,12 +12,12 @@ MTP standardizes automation aspects of modular plants used in process industries
 
 ## DisplayName (Submodel Element - Multi Language Property)
 
-Operator-specific module name
+[https://admin-shell.io/sandbox/vdi/2658/1/0/PEASubmodel/DisplayName](https://admin-shell.io/sandbox/vdi/2658/1/0/PEASubmodel/DisplayName): Operator-specific module name
 
 ## Description (Submodel Element - Multi Language Property)
 
-Operator-specific module description
+[https://admin-shell.io/sandbox/vdi/2658/1/0/PEASubmodel/Description](https://admin-shell.io/sandbox/vdi/2658/1/0/PEASubmodel/Description): Operator-specific module description
 
 ## Contact
 
-This sub-namespace is proposed by [Sten Grüner](https://github.com/StenGruener).
\ No newline at end of file
+This sub-namespace is proposed by [Sten Grüner](https://github.com/StenGruener).
diff --git a/sandbox/vdi/2658/1/0/README.md b/sandbox/vdi/2658/1/0/README.md
index d76ba20..44c3917 100644
--- a/sandbox/vdi/2658/1/0/README.md
+++ b/sandbox/vdi/2658/1/0/README.md
@@ -10,23 +10,23 @@ MTP standardizes automation aspects of modular plants used in process industries
 
 ## MTPSubmodel (Submodel Template)
 
-The submodel defines an entry point to a MTP environment containing an embedded MTP file as SubmodelElement.
+[https://admin-shell.io/sandbox/vdi/2658/1/0/MTPSubmodel](https://admin-shell.io/sandbox/vdi/2658/1/0/MTPSubmodel): The submodel defines an entry point to a MTP environment containing an embedded MTP file as SubmodelElement.
 
 ## MTPReferences (Submodel Element Collection)
 
-Collection containing references to documentation documents which are associated with elements within the MTP file.
+[https://admin-shell.io/sandbox/vdi/2658/1/0/MTPReferences](https://admin-shell.io/sandbox/vdi/2658/1/0/MTPReferences): Collection containing references to documentation documents which are associated with elements within the MTP file.
 
 The IdShort of the actual collection can be chosen differently, e.g., BOMReferences of DocumentationReferences.
 
 ## MTPReference (Relationship Element)
 
-Reference between (first) an opaque element within the MTP file and (second) a  element within the AAS.
+[https://admin-shell.io/sandbox/vdi/2658/1/0/MTPReference](https://admin-shell.io/sandbox/vdi/2658/1/0/MTPReference): Reference between (first) an opaque element within the MTP file and (second) a element within the AAS.
 
 ## PEASubmodel (Submodel Template)
 
-The submodel defines a set of PEA-properties specific to module instance.
+[https://admin-shell.io/sandbox/vdi/2658/1/0/PEASubmodel](https://admin-shell.io/sandbox/vdi/2658/1/0/PEASubmodel): The submodel defines a set of PEA-properties specific to module instance.
 
 
 ## Contact
 
-This sub-namespace is proposed by [Sten Grüner](https://github.com/StenGruener).
\ No newline at end of file
+This sub-namespace is proposed by [Sten Grüner](https://github.com/StenGruener).