diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c233ac4..40ad477 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -1,39 +1,80 @@
-# Check that syntax is correct
+# Check the syntax, semantics and layout of DDLm dictionaries
 
-name: CIFSyntaxandStyleCheck
+name: CIF Syntax and Style Check
 
-# Controls when the action will run. Triggers the workflow on push or pull request
-# events but only for the master branch
+# Controls when the action will run. Triggers the workflow on push or pull
+# request events but only for the main branch
 on:
   push:
     branches:
-            - '*'
+      - main
     paths-ignore:
-            - '.github/**'
+      - '.github/**'
 
   pull_request:
-    branches: [ main ]
+    branches:
+      - main
     paths-ignore:
-            - '.github/**'
-  workflow_dispatch:   
+      - '.github/**'
+
+  workflow_dispatch:
 
 # A workflow run is made up of one or more jobs that can run sequentially or in parallel
 jobs:
   syntax:
-    # The type of runner that the job will run on
+    name: Syntax
     runs-on: ubuntu-latest
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-        - name: checkout
-          uses: actions/checkout@v4
-          
+      - name: Checkout
+        uses: actions/checkout@v4
+
       # Check syntax of all CIF files
-        - name: check_syntax
-          uses: COMCIFS/cif_syntax_check_action@master
-          id: cif_syntax_check
+      - name: Check CIF syntax
+        uses: COMCIFS/cif_syntax_check_action@master
+        id: cif_syntax_check
+
+  semantics:
+    name: Semantics
+    runs-on: ubuntu-latest
+    needs: syntax
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Checkout the DDLm reference dictionary
+        uses: actions/checkout@v4
+        with:
+          repository: COMCIFS/DDLm
+          path: cif-dictionaries/DDLm
+
+      - name: Checkout enumeration templates
+        uses: actions/checkout@v4
+        with:
+          repository: COMCIFS/Enumeration_Templates
+          path: cif-dictionaries/Enumeration_Templates
+
+      - name: Checkout attribute templates
+        uses: actions/checkout@v4
+        with:
+          repository: COMCIFS/Attribute_Templates
+          path: cif-dictionaries/Attribute_Templates
+
+      - name: Checkout the coreCIF dictionary
+        uses: actions/checkout@v4
+        with:
+          repository: COMCIFS/cif_core
+          path: cif-dictionaries/cif_core
+
+      - name: Run dictionary validity checks
+        uses: COMCIFS/dictionary_check_action@main
+        id: ddlm_check
+
   layout:
+    name: Layout
     runs-on: ubuntu-latest
     needs: syntax
 
@@ -42,57 +83,74 @@ jobs:
         uses: actions/cache@v4
         id: cache
         with:
-                 path: ~/.julia
-                 key: ${{ runner.os }}-julia-v2
-                 
+          path: ~/.julia
+          key: ${{ runner.os }}-julia-v2
+
       - name: Install Julia
         uses: julia-actions/setup-julia@v1
         with:
-                version: '1.6'
+          version: '1.10'
 
       - name: Install Julia packages
         if: steps.cache.outputs.cache-hit != 'true'
         run: |
-               julia -e 'import Pkg;Pkg.add("CrystalInfoFramework");Pkg.add("Lerche");Pkg.add("FilePaths");Pkg.add("ArgParse")'
-      - name: checkout
+          julia -e 'import Pkg;Pkg.add("CrystalInfoFramework");Pkg.add("Lerche");Pkg.add("ArgParse")'
+
+      - name: Checkout
         uses: actions/checkout@v4
         with:
-                path: main
-      - name: checkout julia tools
+          path: main
+
+      - name: Checkout julia tools
         uses: actions/checkout@v4
         with:
-                repository: jamesrhester/julia_cif_tools
-                path: julia_cif_tools
+          repository: jamesrhester/julia_cif_tools
+          path: julia_cif_tools
 
-      - name: Checkout CIF master files
+      - name: Checkout the DDLm reference dictionary
         uses: actions/checkout@v4
         with:
-                repository: COMCIFS/cif_core
-                path: cif_core
-      - name: Diagnostics
+          repository: COMCIFS/DDLm
+          path: DDLm
+
+      - name: Checkout enumeration templates
+        uses: actions/checkout@v4
+        with:
+          repository: COMCIFS/Enumeration_Templates
+          path: enum
+
+      - name: Checkout attribute templates
+        uses: actions/checkout@v4
+        with:
+          repository: COMCIFS/Attribute_Templates
+          path: templ
+
+      - name: Checkout the coreCIF dictionary
+        uses: actions/checkout@v4
+        with:
+          repository: COMCIFS/cif_core
+          path: cif_core
+
+      - name: Move template files to the expected location
         run: |
-            ls -a
-            pwd
-            which julia
-      - name: one_dict_layout
+          mv enum/templ_enum.cif cif_core/templ_enum.cif
+          mv templ/templ_attr.cif cif_core/templ_attr.cif
+
+      - name: Run diagnostics
         run: |
-               julia -e 'using Pkg; Pkg.status()'
-               for file in main/*.dic
-               do      
-                  echo "Checking $file"
-                  julia -O0 ./julia_cif_tools/linter.jl -i $PWD/cif_core $file cif_core/ddl.dic
-                  if [ $? != 0 ] 
-                  then 
-                    exit 1 ;
-                  fi 
-               done
-  ddlm:
-    runs-on: ubuntu-latest
-    needs: syntax
-    steps:
-        - name: checkout
-          uses: actions/checkout@v4
+          ls -a
+          pwd
+          which julia
 
-        - name: check_ddlm
-          uses: COMCIFS/dictionary_check_action@main
-          id: ddlm_check
+      - name: Run dictionary layout checks
+        run: |
+          julia -e 'using Pkg; Pkg.status()'
+          for file in main/*.dic
+          do
+            echo "Checking $file"
+            julia -O0 ./julia_cif_tools/linter.jl -i $PWD/cif_core $file $PWD/DDLm/ddl.dic
+            if [ $? != 0 ]
+            then
+              exit 1 ;
+            fi
+          done
diff --git a/cif_ed.dic b/cif_ed.dic
index b65351b..bef49e6 100644
--- a/cif_ed.dic
+++ b/cif_ed.dic
@@ -13,7 +13,7 @@ data_CIF_ED
     _dictionary.title            CIF_ED
     _dictionary.class            Instance
     _dictionary.version          1.0.1-dev
-    _dictionary.date             2025-03-24
+    _dictionary.date             2026-01-19
     _dictionary.uri
          https://raw.githubusercontent.com/COMCIFS/cif_ed/main/cif_ed.dic
     _dictionary.ddl_conformance  4.2.0
@@ -813,7 +813,7 @@ save_
        of the definitions in this dictionary may be copies of core
        definitions with extended attributes.
 ;
-         1.0.1-dev                2025-03-24
+         1.0.1-dev                2026-01-19
 ;
        # Please update the date above and describe the change below until
        # ready for the next release