* TODO:
*
* macro to flag unimplemented blocks
- * XML_CATALOG_PREFER user env to select between system/public prefered
+ * XML_CATALOG_PREFER user env to select between system/public preferred
* option. C.f. Richard Tobin <richard@cogsci.ed.ac.uk>
*> Just FYI, I am using an environment variable XML_CATALOG_PREFER with
*> values "system" and "public". I have made the default be "system" to