Install yasnippet and vala-snippets packages

elpa/yasnippet-20160924.2001/snippets/dix-mode/s

@@ -0,0 +1,9 @@
+# -*- mode: snippet; require-final-newline: nil -*-
+# name: <s> element
+# key: <s
+# binding: direct-keybinding
+# condition: (progn (backward-char 2) (member (dix-enclosing-elt 'noerror) '("l" "r" "i" "g")))
+#Note: requires (eval-after-load 'yasnippet '(add-to-list 'yas-key-syntaxes 'dix-yas-skip-backwards-to-key))
+#so that you can expand it after regular letter chars
+# --
+<s n="$1"/>$0