Extending elements and types not working

, ,
1

Imported from previous forum

2

The fixml-schema-4-4-guide-20040109.pdf document states

"Adding a field to a component or message contained in one of the message categories is done in the same way you modify the components schema file. You need to redefine the portion of the message in the implementation version of the file."

Contrary to this statement, most elements and message types (ie NewOrderSingleMessage_t and Order) are sealed with the final="#all" attribute.

Is there any standard way to extended these elements or types?

Thanks,
Eric