config file has .xml ending, yang/clixon-config.yang is used as

model for an xml-based configuration file

lib/clixon/clixon_xml.h

@@ -57,7 +57,12 @@ enum cxobj_type {CX_ERROR=-1,
 
 typedef struct xml cxobj; /* struct defined in clicon_xml.c */
 
-/*! Callback function type for xml_apply */
+/*! Callback function type for xml_apply 
+ * @retval    -1    Error, aborted at first error encounter
+ * @retval     0    OK, continue
+ * @retval     1    Abort, dont continue with others
+ * @retval     2    Locally, just abort this subtree, continue with others
+ */
 typedef int (xml_applyfn_t)(cxobj *yn, void *arg);
 
 /*