--- /dev/null
+check:
+ find . -name "*.xml" -exec xmllint -valid -loaddtd -noout {} \; 2> errors
+ if [ -s errors ] ; \
+ then \
+ echo ; \
+ echo "**************************************************" ; \
+ echo "There are validity errors. Check the file \"errors\"" ; \
+ echo "**************************************************" ; \
+ else \
+ rm errors ; \
+ echo ; \
+ echo "****************************" ; \
+ echo "All the documents are valid." ; \
+ echo "****************************" ; \
+ fi