[Goanna-developers] Problems with new new xml_document validation

[Neal L. <ne...@3d...>]

Hi Stephan,

I've started testing the new xml authoring generation/xml validation code.

I have a rnc which has an element:

level_2_button = element standard_page:level_2_button { name, value, 
display_value, tool_tip?, text_item? }
display_value = attribute display_value { text }

name and value are attributes declared in goa_common
tool_tip and text_item are elements declared in goa_common

if I call:

start_level_2_button_element ("Name", "Value", "Display Value")
end_current_element

I get an exception although this element is permitted to be empty. 
The generated validity statement looks like:

level_2_button_content_validity: GOA_XML_ELEMENT_SCHEMA is
		-- Schema representing valid contents of a(n) level_2_button element
	once
		create Result.make (
			create {GOA_XML_SCHEMA_ELEMENT_CONJUNCTION}.make_required (
			<<
			create {GOA_XML_SCHEMA_ELEMENT}.make_optional (tool_tip_element_code),
			create {GOA_XML_SCHEMA_ELEMENT}.make_optional (text_item_element_code)
			>>)
			)
		end

Shouldn't the conjunction also be make_optional?

Also, it appears that using the |= operator no longer works when 
combining schemas.  I noticed the template to deal with that in (I 
think) flatten_2 was commented out.  I just removed the only place 
I'm using that operator (you may have noticed todays change in 
goa_common.rnc) so fixing this is a lower priority (if it won't be 
done for a while we should update the documentation accordingly).

Neal