diff -r 9d0505d80044 -r 7eea57f6d847 dav/config.c
--- a/dav/config.c	Sun Sep 24 11:31:01 2017 +0200
+++ b/dav/config.c	Sun Sep 24 14:31:42 2017 +0200
@@ -139,6 +139,8 @@
                 ret = load_proxy(ctx->http_proxy, node, HTTP_PROXY);
             } else if (xstreq(node->name, "https-proxy")) {
                 ret = load_proxy(ctx->https_proxy, node, HTTPS_PROXY);
+            } else if (xstreq(node->name, "namespace")) {
+                ret = load_namespace(node);
             } else {
                 fprintf(stderr, "Unknown config element: %s\n", node->name);
                 ret = 1;
@@ -496,7 +498,63 @@
     
     fclose(file);
     return k;
-} 
+}
+
+static char* get_attr_content(xmlNode *node) {
+    // TODO: remove code duplication (util_xml_get_text)
+    while(node) {
+        if(node->type == XML_TEXT_NODE) {
+            return (char*)node->content;
+        }
+        node = node->next;
+    }
+    return NULL;
+}
+
+int load_namespace(const xmlNode *node) {
+    const char *prefix = NULL;
+    const char *uri = NULL;
+    
+    xmlAttr *attr = node->properties;
+    while(attr) {
+        if(attr->type == XML_ATTRIBUTE_NODE) {
+            char *value = get_attr_content(attr->children);
+            if(!value) {
+                print_error(
+                        node->line,
+                        "missing value for attribute %s\n", (char*)attr->name);
+                return 1;
+            }
+            if(xstreq(attr->name, "prefix")) {
+                prefix = value;
+            } else if(xstreq(attr->name, "uri")) {
+                uri = value;
+            } else {
+                print_error(
+                        node->line,
+                        "unknown attribute %s\n", (char*)attr->name);
+                return 1;
+            }
+        }
+        attr = attr->next;
+    }
+    
+    if(!prefix) {
+        print_error(node->line, "missing prefix attribute\n");
+        return 1;
+    }
+    if(!uri) {
+        print_error(node->line, "missing uri attribute\n");
+        return 1;
+    }
+    
+    if(dav_get_namespace(context, prefix)) {
+        fprintf(stderr, "Error: namespace prefix '%s' already used\n", prefix);
+        return 1;
+    }
+    
+    return dav_add_namespace(context, prefix, uri);
+}
 
 Repository* get_repository(sstr_t name) {
     if(!name.ptr) {