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MQSeries.net Forum Index » WebSphere Message Broker (ACE) Support » order of XML elements

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WBI_user
PostPosted: Tue Mar 15, 2005 10:02 am    Post subject: order of XML elements Reply with quote

Partisan

Joined: 07 Aug 2001
Posts: 386
A program expects the input as follow:
<ROOT>
<AA>
<11>... </11>
:
<99> .. </99>
</AA>
<BB>
<XX>... </XX>
:
<ZZ> .. </ZZ>
</BB>
<CC>
<MM>... </MM>
:
<RR> .. </RR>
</CC>
</ROOT>

I am using WBI MB to produce the XML message to input to the program and the output looks like:
<ROOT>
<AA>
<11>... </11>
:
<99> .. </99>
</AA>
<CC>
<MM>... </MM>
:
<RR> .. </RR>
</CC>
<BB>
<XX>... </XX>
:
<ZZ> .. </ZZ>
</BB>
</ROOT>

The sequence of the elements is AA CC BB instead of AA BB CC expected by the program.

I am a beginner to XML. My questions are
1. Within XML specification, does the sequence of the XML element within the same level matters. If it does not not, then the program should accept the output from the broker with no complain.
2. If it does matters, how do I ensure that the broker will output the XML in the right order. Should the order be in exactly the sequence of the ESQL coded. Is there any way that can affect the order that the MB output the XML elements ?
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jefflowrey
PostPosted: Tue Mar 15, 2005 10:10 am    Post subject: Re: order of XML elements Reply with quote

Grand Poobah

Joined: 16 Oct 2002
Posts: 19981
WBI_user wrote:
1. Within XML specification, does the sequence of the XML element within the same level matters. If it does not not, then the program should accept the output from the broker with no complain.
It depends.
WBI_user wrote:
Should the order be in exactly the sequence of the ESQL coded. Is there any way that can affect the order that the MB output the XML elements ?

What does the ESQL documentation say?
_________________
I am *not* the model of the modern major general.
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fuwafuwausagi
PostPosted: Tue Mar 15, 2005 11:19 am    Post subject: Reply with quote

Newbie

Joined: 17 May 2001
Posts: 2
It depends is the answer.

However in general a program should not car about the tag order within a tag.

So if I had:

<Outer>
<Data>
<Animals>
<Cat>
<Claws>sharp</Claws>
<Fur>fluffy</Fur>
</Cat>
<Dog>
<Claws>blunt</Claws>
<Fur>smelly</Fur>
</Dog>
</Animals>
</Data>
</Outer>

It should make no difference to an application program trying to access the value of "smelly" in Outer.Data.Animals.Dog.Fur if the date is:

<Outer>
<Data>
<Animals>
<Cat>
<Claws>sharp</Claws>
<Fur>fluffy</Fur>
</Cat>
<Dog>
<Fur>smelly</Fur>
<Claws>blunt</Claws>
</Dog>
</Animals>
</Data>
</Outer>

OR

<Outer>
<Data>
<Animals>
<Dog>
<Claws>blunt</Claws>
<Fur>smelly</Fur>
</Dog>
<Cat>
<Claws>sharp</Claws>
<Fur>fluffy</Fur>
</Cat>
</Animals>
</Data>
</Outer>

The answer should be the same.

The broker builds the fields in the order you tell it to.

Regards,

FuwaFuwaUsagi
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