diff --git a/.gitignore b/.gitignore
index ccb0c7fc..bf6b5205 100644
--- a/.gitignore
+++ b/.gitignore
@@ -25,3 +25,21 @@ Thumbs.db
 # vim swap files
 #####################
 *.*sw*
+
+# documentation
+#####################
+documentation/API/html/
+documentation/UserManual/html/
+documentation/UserManual/*.4ct
+documentation/UserManual/*.4tc
+documentation/UserManual/*.aux
+documentation/UserManual/*.dvi
+documentation/UserManual/*.css
+documentation/UserManual/*.html
+documentation/UserManual/*.idv
+documentation/UserManual/*.lg
+documentation/UserManual/*.out
+documentation/UserManual/*.tmp
+documentation/UserManual/*.toc
+documentation/UserManual/*.xref
+documentation/UserManual/*.xref