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- From: Bob Kline <bkline@rksystems.com>
- To: Pen Chiang <ppc@redix.com>
- Date: Wed, 7 Jun 2000 00:32:20 -0400 (EDT)
On Tue, 6 Jun 2000, Pen Chiang wrote:
> I am wondering if someone can help me with this problem. I was using the
> getLength method of the NameNodeMap class to get the attributes from my
> node. I have two problems in using this method. My first problem is that my
> attributes sequence become re-ordered. Secondly, when the data is not
> there, I cannot get my attributes with the #IMPLIED data definition.
>
> Here is my DTD for the Header record:
> <!ATTLIST Header Document_No CDATA #REQUIRED
> Release_No CDATA #REQUIRED
> Type_Qualifier (A |B) #IMPLIED
> Qty_Qualifer CDATA #FIXED "A"
> Type_Code DATA #FIXED "PS">
>
> My input data:
> <Header Document_No="123" Release_No="001" >
>
> By using the code listed below, I got these answers:
> <Header Release_No = "001" Document_No = "123" Type_Code"PS" Qty_Qualifer =
> "A">
>
> I was hoping to generate the following stream,
> <Header Document_No = "123" Release_No = "001" Type_Qualifier=""
> Qty_Qualifer = "A" Type_Code"PS" >
>
You're seeing the correct behavior. Order of attributes is not
guaranteed. And #IMPLIED really means "optional." If the attribute
isn't in the original (and it doesn't have a default), then you won't
find a node for it in the tree.
--
Bob Kline
mailto:bkline@rksystems.com
http://www.rksystems.com
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