Hi,
I am involved in an international initiative to standardize the communication protocol of airport devices.
We heavily use XML in our standard and we are facing a question that no one in our group, including myself can come to a resolution without adding more complexity.
The problem is:
Can we assume a sequence of identical XML nodes will have the same order in the memory of the receiver once they have been parsed?
Or do we have to add a sequenceID element to ensure the receiver orders these nodes accordingly.
In other words, should we send:
<?xml version="1.0" encoding="utf-8"?>
<OrderedMessages>
<Message ID="1">Text1</Message>
<Message ID="2">Text2</Message>
<Message ID="3">Text3</Message>
</OrderedMessages>
or more simply
<?xml version="1.0" encoding="utf-8"?>
<OrderedMessages>
<Message>Text1</Message>
<Message>Text2</Message>
<Message>Text3</Message>
</OrderedMessages>
If we want to make sure that Text1 is processed 1st then Text2, so on and so forth.
It is my understanding if we enforce DOM parsing, then the ID is useless as the text elements will naturally keep the same sequencing.
Any feedbacks or references would be greatly appreciated. I haven't found any specifics so far.
Thank you many in advance for your assistance.
Regards
Christian Porzio
Transportation Application Unit
HP Enterprise Services
Mobile +1 404 610 6128
Email: christian.porzio@hp.com
