[xquery-talk] Query Through Multiple Files

[Wei, Alice J.]

Hi, Michanel:

   Thanks for pointing out the error I had with the distinct-values(),

    As for the point on using the template you provided, since I use the TEI, I don't think I could use it. I did use Liam's suggestions,

for $ad in (
       doc("1.xml"),
       doc("2.xml"),
       doc("3.xml"),
       doc("4.xml"))//ad

and the error tells me

 FORG0006: Effective boolean value is not defined for a sequence of two or more items
  starting with a string
Query processing failed: Run-time errors were reported

Is this the type of error I should be getting?
Thanks for your help.

======================================================
Alice Wei
MIS 2008
School of Library and Information Science
Indiana University Bloomington
ajwei at indiana.edu
________________________________________
From: Michael Kay [mike at saxonica.com]
Sent: Sunday, January 20, 2008 4:02 AM
To: 'Liam Quin'; Wei, Alice J.
Cc: talk at x-query.com
Subject: RE: [xquery-talk] Query Through Multiple Files

>
> You probably need to use an XQuery collection; however, the
> way this works varied between products, so it would depend on
> which XQuery implementation you were using.
>
> It is possible to query multiple files portably if you know
> their names

Another way of doing it that is portable is to create a document that
contains links to the documents you want to search:

<dir>
  <file>boys.xml</file>
  <file>girls.xml</file>
  <file>men.xml</file>
  <file>women.xml</file>
</dir>

then

 for $doc in /dir/file/doc(.)
 return $doc//ap/address

You wrote:

for $read in ... where distinct-values($read) return...

It's disappointing that after all the help you were given last week you
still haven't grasped that this is nonsense. The value of $read is a single
item, and passing a single item to distinct-values has no useful effect. If
you don't understand the advice you are getting, please say so and ask for
further explanation - it's a waste of everyone's time if you ignore the
advice and just keep making the same mistake.

Michael Kay
http://www.saxonica.com/