Re: [opendocument-users] table:table required elements

[Regina Henschel <rb.henschel@t-online.de>]

Hi Jean-Christophe,

Jean-Christophe Helary schrieb am 01-Feb-20 um 17:32:
> Regina,
>
> Thank you very much for your reply.
>
> > It seems to me, that a "table:table-column" element is missing in your file. It is allowed, that it is empty; but it is not optional.
>
> I am not so skilled as to be able to parse the relax schema and the OpenDocument-v1.2-os-part1.html document does not seem to give that information.
>
> Would you be able to tell my what I am missing in the references in my possession that is actually telling me that table:table-column is a requirement?

Using the schema manually you get:
"table:table" refers "table-columns-and-groups"
Unfortunately a ref has not indication, whether it is optional or not. 
So you need to follow it.
"table-columns-and-groups" has _<oneOrMore>_ of either 
"table-table-column-group" or "table-columns-no-group".

"table-table-column-group" is element "table:table-column-group". 
Because emacs misses contents, we can ignore the attlist and need only 
follow the ref "table-columns-and-groups". That is recursive, see above.

"table-columns-no-group" has some <optional> parts, which we can ignore 
here. But we need to follow the ref. That is either "table-columns" or 
"table-table-header-columns".

"table-table-header-columns" is element "table:table-header-columns", 
which has _<oneOrMore>_ of ref "table-table-column".

"table-columns" has either a ref to "table-table-columns" or 
_<oneOrMore>_ "table-table-column"

"table-table-columns" is element "table:table-Columns", which has 
_<oneOrMore>_ ref "table-table-column".

So on each way we get that <oneOrMore> of "table-table-column" is needed.


And finally
	<define name="table-table-column">
		<element name="table:table-column">
			<ref name="table-table-column-attlist"/>
			<empty/>
		</element>
	</define>

That is an empty element, which has some Attributes.


If you use the file 
Emacs.app/Contents/Resources/etc/schema/od-schema-v1.2-os.rnc, you will 
find, that it has a different syntax, but the same information.
In that notation <optional> has the syntax "?" and <oneOrMore> has the 
syntax "+".


There exists some tools to validate a file against a schema. A search 
should give you some, which are available for your operating system. 
Perhaps one of them is more verbose than emacs and tells you, which 
element is actually missing.


A very different way might be to use ODFDOM of the odftoolkit 
https://odftoolkit.org/. It moved recently from 'Apache' to 'The 
Document Foundation'. The project has a mailing list, where you can ask, 
whether it is suitable for your purpose.

Kind regards
Regina