Re: Required item type of first argument of <function>

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Subject: Re: Required item type of first argument of <function> is node(); supplied value has item type xs:string
From: "G. Ken Holman" <gkholman@xxxxxxxxxxxxxxxxxxxx>
Date: Fri, 19 Feb 2010 16:58:18 -0500

At 2010-02-19 13:52 -0800, Spencer Tickner wrote:

Ok, then if I make the template more generic.. ie:

In my response I made it generic by declaring the type of the parameter as an item:

<xsl:pram name="n" as="item()"/>

       <xsl:function name="qp:test" as="item()*"
xmlns:functx="http://www.qplegaleze.ca">
               <xsl:param name="n"/>

Is there a way to test if $n is a String?

Sure:

<xsl:when test="$n instance of xsd:string">

... but because your second <xsl:when> relies on $n being a node, I thought it safest to catch all atomic values by testing that the argument isn't a node. I tell my students to write their transformations defensively so as to catch unexpected inputs. I don't think it is safe to simply check only for a string because the next test is going to choke on atomic values of other types.

I hope this helps.

. . . . . . . . . . . . Ken


--
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Current Thread

Required item type of first argument of <function> is node(); supplied value has item type xs:string
- Spencer Tickner - 19 Feb 2010 21:31:05 -0000
  - Message not available
    - G. Ken Holman - 19 Feb 2010 21:46:20 -0000
      - Spencer Tickner - 19 Feb 2010 21:54:00 -0000
      - G. Ken Holman - 19 Feb 2010 21:58:52 -0000 <=
      - Spencer Tickner - 19 Feb 2010 22:03:17 -0000
  - Michael Kay - 19 Feb 2010 22:09:01 -0000
    - Spencer Tickner - 19 Feb 2010 22:29:40 -0000

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