protected void createLangAltProperty(String tikaKey, String ns, String propertyName)
            throws XMPException {
        String value = metadata.get(tikaKey);
        if (value != null && value.length() > 0) {
            meta.setLocalizedText(ns, propertyName, null, XMPConst.X_DEFAULT, value);
        }
    }
Creates a language alternative property in the x-default language

@param tikaKey      Key in the Tika metadata map
@param ns           namespace the property should be created in
@param propertyName name of the property
@throws XMPException if the property could not be created
tika-xmp/src/main/java/org/apache/tika/xmp/convert/AbstractConverter.java