diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..d7e200e
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "source_documents/OWASP_ASVS"]
+	path = source_documents/OWASP_ASVS
+	url = https://github.com/OWASP/ASVS.git
diff --git a/source_documents/IEC62443/IEC_62443_CR_SR_verified_text.xlsx b/source_documents/IEC62443/IEC_62443_CR_SR_verified_text.xlsx
new file mode 100644
index 0000000..2a30957
Binary files /dev/null and b/source_documents/IEC62443/IEC_62443_CR_SR_verified_text.xlsx differ
diff --git a/source_documents/OWASP_ASVS b/source_documents/OWASP_ASVS
new file mode 160000
index 0000000..2b30071
--- /dev/null
+++ b/source_documents/OWASP_ASVS
@@ -0,0 +1 @@
+Subproject commit 2b300716ebbef654788d0a14d6c878cecc70c2e9