diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 6ab2447..9e8bc35 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -7,7 +7,7 @@
 name: Check the IVOA document
 
 env:
-  doc_name: HiPS
+  doc_name:
 
 on:
   pull_request:
diff --git a/.github/workflows/preview.yml b/.github/workflows/preview.yml
index 879541d..607aca5 100644
--- a/.github/workflows/preview.yml
+++ b/.github/workflows/preview.yml
@@ -7,7 +7,7 @@
 name: Update PDF Preview
 
 env:
-  doc_name   : HiPS
+  doc_name   :
   branch_name: ${{ github.head_ref || github.ref_name }}
   tag_preview: auto-pdf-preview
 
diff --git a/HiPS.toc b/HiPS.toc
new file mode 100644
index 0000000..945f91c
--- /dev/null
+++ b/HiPS.toc
@@ -0,0 +1,4 @@
+\contentsline {section}{\numberline {1}Introduction}{2}{section.1}%
+\contentsline {subsection}{\numberline {1.1}Role within the VO Architecture}{2}{subsection.1.1}%
+\contentsline {section}{\numberline {A}Changes from Previous Versions}{2}{appendix.A}%
+\contentsline {section}{References}{3}{section*.5}%
diff --git a/role_diagram.pdf b/role_diagram.pdf
new file mode 100644
index 0000000..b705cb4
Binary files /dev/null and b/role_diagram.pdf differ