XSL documentation update

doc/XSL.md

@@ -10,14 +10,35 @@ element of a publication is part ([tei2eoatex-parts.xsl](https://github.molgen.m
 ([tei2eoatex-noparts.xsl](https://github.molgen.mpg.de/EditionOpenAccess/EOASkripts/blob/master/data/tei2eoatex-noparts.xsl)). Both scripts then import
 [tei2eoatex-common.xsl](https://github.molgen.mpg.de/EditionOpenAccess/EOASkripts/blob/master/data/tei2eoatex-common.xsl) which contains the rest of the templates.
 
-There is command line parameter available which toggles the creation
-and inclusion of a List of Contributors (mainly used in edited books).
-It is set to `false` by default. Enable it by adding
+## Command line switches
+Four command line switches are available
+### Document structure (required)
+This switch is required and tells if the document structure contains parts or not.
+
+Use value `1` if there are parts.
+
+    parts=1
+
+Use value `0` if there are no parts.
+
+    parts=0
+### List of contributors (optional)
+Toggles the creation and inclusion of a List of Contributors (mainly
+used in edited books). It is optional set to `false` by default.
+Enable it by adding
 
      contributors=1
 
 to the command line.
+### Verbosity (optional)
+Selects the amount of output messages during runtime. Possible values are `0`, `1`, `2`. Example:
+
+    verbosity=1
+### Frontmatter
+Toggles the creation and inclusion of a frontmatter, which is
+generated from the TEI header. Default: `false`. To enable it, use
 
+frontmatter=1
 ## Output
 
 The transformation will create a number of files that closely