_.extend(OC.Files.Client, {
        PROPERTY_FILEID:    '{' + OC.Files.Client.NS_OWNCLOUD + '}id',
        PROPERTY_VERSION_EDITED_BY:    '{' + OC.Files.Client.NS_OWNCLOUD + '}meta-version-edited-by',
        PROPERTY_VERSION_EDITED_BY_NAME:    '{' + OC.Files.Client.NS_OWNCLOUD + '}meta-version-edited-by-name',
        PROPERTY_VERSION_TAG:    '{' + OC.Files.Client.NS_OWNCLOUD + '}meta-version-tag',