[rules-users] Solution for reasoning over XML?

[FrankVhh]

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 <

> frank.vanhoenshoven@

> > 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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