Index: rarian-0.8.1/librarian/rarian-reg-full.c
===================================================================
--- rarian-0.8.1.orig/librarian/rarian-reg-full.c
+++ rarian-0.8.1/librarian/rarian-reg-full.c
@@ -338,6 +338,8 @@ process_pair_full (RrnRegFull *reg, char
     }
   } else if (!strcmp (key, "Icon")){
     reg->icon = strdup (value);
+  } else if (!strncmp (key, "X-", 2)) {
+    /* ignore */
   } else {
     fprintf (stderr, "WARNING: Unknown element %s: %s\n", key, value);
   }
@@ -627,6 +629,8 @@ process_sect_pair_full (RrnSectFull *sec
         sect->uri = rrn_full_add_field (sect->uri, value, lang);
     } else if (!strcmp (key, "SectionDocument") || !strcmp (key, "sectiondocument")) {
         sect->owner = strdup (value);
+    } else if (!strncmp (key, "X-", 2)) {
+        /* ignore */
     } else {
         fprintf (stderr, "WARNING: Unknown element for section %s: %s\n", key, value);
     }
Index: rarian-0.8.1/librarian/rarian-reg-utils.c
===================================================================
--- rarian-0.8.1.orig/librarian/rarian-reg-utils.c
+++ rarian-0.8.1/librarian/rarian-reg-utils.c
@@ -505,6 +505,8 @@ process_pair (RrnReg *reg, char *key, ch
     reg->identifier = strdup (value);
   } else if (!strcmp (key, "X-DOC-Weight")) {
     reg->weight = atoi (value);
+  } else if (!strncmp (key, "X-")) {
+    /* ignore */
   } else {
     fprintf (stderr, "WARNING: Unknown element %s: %s\n", key, value);
   }
@@ -847,6 +849,8 @@ process_sect_pair (RrnSect *sect, char *
         process_field (&(sect->uri), NULL, key, value);
     } else if (!strcmp (key, "SectionDocument") || !strcmp (key, "sectiondocument")) {
         sect->owner = strdup (value);
+    } else if (!strncmp (key, "X-", 2)) {
+        /* ignore */
     } else {
         fprintf (stderr, "WARNING: Unknown element for section %s: %s\n", key, value);
     }