Add short doc for xol format.

diff --git a/xmldoc/formats/xol.xml b/xmldoc/formats/xol.xml
new file mode 100644 (file)
index 0000000..9910e16
--- /dev/null
+++ b/xmldoc/formats/xol.xml
@@ -0,0 +1,7 @@
+<para>
+   This module reads and writes xml based (.xol) files used by
+   <ulink url="http://www.swisstopo.ch">Swiss Map</ulink> software.
+</para>
+<para>
+   These files uses the "Swiss national grid" (CS-1903) to store coordinates.
+</para>