[ 
http://issues.apache.org/jira/browse/DERBY-1655?page=comments#action_12429495 ] 
            
A B commented on DERBY-1655:
----------------------------

> Okay to refer to it as a function instead of an operator?

Great question.  I guess I'm not sure what the answer here should be...

I've been calling these "operators" because that's the term used in the 
SQL/XML[2006] specification.

But the Derby doc says the following:

"A built-in function is an expression in which an SQL keyword or special 
operator executes
some operation."

And the SQL/XML specification indicates XMLEXISTS, etc are reserved keywords.  
So based on that I guess it would be okay to refer to the new SQL/XML operators 
as Derby built-in functions, as well.

My gut feeling, though, is that we should continue to use the term "operator" 
for these because a) that's the term used by the SQL/XML specification and b) I 
don't think we state anywhere that an "operator" cannot be a "function" as well.

I am not going to complain one way or the other, though.  If anyone else has a 
strong preference, feel free to speak up...

> Document XML functionality for 10.2
> -----------------------------------
>
>                 Key: DERBY-1655
>                 URL: http://issues.apache.org/jira/browse/DERBY-1655
>             Project: Derby
>          Issue Type: Task
>          Components: Documentation
>    Affects Versions: 10.2.1.0
>            Reporter: A B
>         Assigned To: Laura Stewart
>             Fix For: 10.2.1.0
>
>         Attachments: ctoolsimport27052.html, derby1655_devguide.diff, 
> derby1655_devguide_html.zip, derby1655_ref.diff, derby1655_ref_html.zip, 
> derby1655_tools_html.diff, derby1655_tuning.diff, derby1655_tuning_html.zip, 
> DerbyXMLDoc_v1.html, DerbyXMLDoc_v2.html
>
>
> DERBY-334 and DERBY-688 have added an XML datatype and four XML operators to 
> Derby.  These are all going to be exposed to the user for general use as part 
> of the 10.2. release, so the datatype and operators need to be documented 
> accordingly.

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