[rules-users] Solution for reasoning over XML?

[Wolfgang Laun]

Frank,

there's absolutely no need for an apology. What I did present in my
paper *is* based on JAXB (or similar) unmarshalling into Pojos. Not
knowing OP's reasons for staying with XML elements I could only
recommend using a *similar* approach.

-W


On 11/01/2013, FrankVhh <frank.vanhoenshoven at agserv.eu> wrote:
> Sorry, I apologize.
>
> It was wrong for me to say "With Wolfgangs approach", as I do not know it
> well enough at all. I was referring to an approach were you would use JAXB
> to create pojo objects form the xml and reason on them. My brain must have
> fooled me in equalizing it with your approach.
>
> Sorry to deceive you all.
>
> Regards,
> Frank
>
>
> laune wrote
>> On 11/01/2013, FrankVhh &lt;
>
>> frank.vanhoenshoven@
>
>> &gt; wrote:
>>> With Wolfgang's approach, your patterns looking like:
>>>
>>> XmlElement(name="SomeClass",value="foo",attribute["myAttr"] == bar)
>>>
>>> Would turn into:
>>>
>>> SomeClass(value == "foo", myAttr == "bar")
>>
>> Not quite. A DOM tree would be represented by a very small object
>> hierarchy according to the XML node typology:
>> node-element-attribute-text, etc. What I proposed in my IntelliFest
>> 2012 paper is the addition of facts representing the DOM *structure*
>> to Pojos unmarshalled from the DOM tree.
>>
>>>
>>> Without having any numbers, we can still safely say that the performance
>>> improvement that you should get from using the pojo's, especially with
>>> "big"
>>> files, should be somewhere in between "quite considerable" and "huge".
>>
>> It may reduce the number of facts by an order of magnitude, depends on
>> the XML tree's fan out, with consequences for insert, etc. There may
>> also be a penalty due to remaining at the level of "all is String"
>> (depends on the data).
>>
>> -W
>>
>>>
>>> Out of curiosity:
>>>  A) Do you also call Modify or Update in your THEN clause?
>>>  B) What does this DSL phrase resolve to?
>>>
>>> An XML element exists
>>> - named someName with a value of
>>> - at path /some/xpathlike/path with a value in "someVal","someOtherVal"
>>>
>>> Regards,
>>> Frank
>>>
>>>
>>>
>>>
>>>
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