diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..0a5de72
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,18 @@
+*.blg
+*.toc
+*.out
+*.pdf
+*.aux
+*.bbl
+ivoatexmeta.tex
+*.log
+*.html
+*.zip
+*.fdb_latexmk
+*.fls
+gitmeta.tex
+*.swp
+role_diagram.svg
+
+# OS-specific
+.DS_Store
diff --git a/SIA.tex b/SIA.tex
index cce0585..6995740 100644
--- a/SIA.tex
+++ b/SIA.tex
@@ -2,7 +2,7 @@
 \input tthdefs
 
 \newcommand{\xtype}[1]{\texttt{#1}}
-\newcommand{\ucd}[1]{\texttt{#1}}
+\providecommand{\ucd}[1]{\texttt{#1}}
 
 \usepackage{listings}
 \lstloadlanguages{XML,sh}
diff --git a/ivoatex b/ivoatex
index 5f09429..c5c7e22 160000
--- a/ivoatex
+++ b/ivoatex
@@ -1 +1 @@
-Subproject commit 5f09429af9e9f56aa2c66aeb17121fb6837e7498
+Subproject commit c5c7e224a01eb3c5586563529317148c919dafb3