diff -r 4322b8953bd5 -r ab9c5afdc243 dav/sync.c
--- a/dav/sync.c	Sun Feb 04 11:14:20 2018 +0100
+++ b/dav/sync.c	Sun Feb 04 12:36:26 2018 +0100
@@ -973,22 +973,7 @@
                         }
                         
                         if(dir->tagconfig && local_res->tags_updated && !abort) {
-                            // get tags from tagstore (xattr or something else)
-                            // and store it in resource property
-                            UcxList *tags = sync_get_file_tags(dir, local_res, NULL);
-                            DavXmlNode *prop = create_xml_taglist(tags);
-                            if(prop) {
-                                dav_set_property_ns(res, DAV_NS, "tags", prop);
-                                printf("update: %s\n", local_res->path);
-                                if(dav_store(res)) {
-                                    print_resource_error(sn, local_res->path);
-                                    ret = -1;
-                                    sync_error++;
-                                } else {
-                                    sync_success++;
-                                    local_res->tags_updated = 0;
-                                }
-                            }
+                            sync_update_tags(dir, sn, res, local_res);
                         }
                     } else {
                         // dav_exists() failed
@@ -1248,6 +1233,9 @@
         if(db_res->etag) {
             res->etag = strdup(db_res->etag);
         }
+        if(db_res->tags_hash) {
+            res->tags_hash = strdup(db_res->tags_hash);
+        }
         
         if(dir->tagconfig && dir->tagconfig->detect_changes && !res->tags_updated) {
             UcxBuffer *tags = sync_get_file_tag_data(dir, res);
@@ -1261,6 +1249,8 @@
                 } else {
                     res->tags_updated = 1;
                 }
+            } else if(db_res->tags_hash) {
+                res->tags_updated = 1; // tags removed
             }
         }
         
@@ -1538,7 +1528,7 @@
     dav_set_content(res, in, (dav_read_func)fread);
     
     if(dir->tagconfig) {
-        UcxList *tags = sync_get_file_tags(dir, local, NULL); // TODO: check remote tags
+        UcxList *tags = sync_get_file_tags(dir, local, NULL);
         DavXmlNode *prop = create_xml_taglist(tags);
         if(prop) {
             dav_set_property_ns(res, DAV_NS, "tags", prop);
@@ -1671,73 +1661,34 @@
 }
 
 int sync_update_tags(SyncDirectory *dir, DavSession *sn, DavResource *res, LocalResource *local) {
-    if(!dir->tagconfig) {
+    if(!dir->tagconfig || !local->tags_updated) {
         return 0;
     }
     
     // get local tags
-    DavBool changed = FALSE;
-    UcxList *tags = sync_get_file_tags(dir, local, &changed);
-    if(!tags || !changed) {
-        return 0;
+    UcxList *tags = sync_get_file_tags(dir, local, NULL);
+    
+    DavXmlNode *prop = create_xml_taglist(tags);
+    if(prop) {
+        dav_set_property_ns(res, DAV_NS, "tags", prop);
+    } else {
+        dav_remove_property_ns(res, DAV_NS, "tags");
     }
     
-    // local tags changed
-    DavBool update_tags = TRUE;
-    if(dir->tagconfig->conflict != TAG_NO_CONFLICT) {
-        // get tags from the server
-        DavXmlNode *tagsprop = dav_get_property_ns(res, DAV_NS, "tags");
-        UcxList *remote_tags = NULL;
-        if(tagsprop) {
-            remote_tags = parse_dav_xml_taglist(tagsprop);
+    printf("update: %s\n", local->path);
+    if(dav_store(res)) {
+        print_resource_error(sn, local->path);
+    } else {
+        UcxBuffer *tag_data = local->cached_tags;
+        if(local->tags_hash) {
+            free(local->tags_hash);
+            local->tags_hash = NULL;
         }
-        
-        if(remote_tags) {
-            // compare the local tags with server tags
-            DavBool tags_equal = TRUE;
-            UcxList *local_t = tags;
-            UcxList *remote_t = remote_tags;
-            while(local_t) {
-                if(!remote_t) {
-                    tags_equal = FALSE;
-                    break;
-                }
-                
-                DavTag *lt = local_t->data;
-                DavTag *rt = remote_t->data;
-                if(strcmp(lt->name, rt->name)) {
-                    tags_equal = FALSE;
-                    break;
-                }
-                
-                local_t = local_t->next;
-                remote_t = remote_t->next;
-            }
-            
-            if(!tags_equal) {
-                switch(dir->tagconfig->conflict) {
-                    case TAG_KEEP_LOCAL: break;
-                    case TAG_KEEP_REMOTE: 
-                    case TAG_MERGE: {
-                        printf("skip update: %s\n", local->path);
-                        update_tags = FALSE;
-                        break;
-                    }
-                }
-            }
-            
-            // TODO: free remote_tags
+        if(tag_data) {
+            char *hash = dav_create_hash(tag_data->space, tag_data->size);
+            local->tags_hash = hash;
         }
-    }
-    
-    if(update_tags) {
-        DavXmlNode *prop = create_xml_taglist(tags);
-        if(prop) {
-            dav_set_property_ns(res, DAV_NS, "tags", prop);
-            if(dav_store(res)) {
-                print_resource_error(sn, local->path);
-            }
-        }
+        local->tags_updated = FALSE;
     }
     
     // TODO: free stuff