[pdal] Pipeline XML as primary channel?

[Howard Butler]

On Aug 17, 2011, at 5:40 PM, Michael P. Gerlek wrote:

>> `//Filter[@type="filters.reprojection"]` seems cleaner than
>> `//Filter/Type[text()="filters.reprojection"/..`.
> 
> Wow, they both just look like so much @$#^@%$//! line noise to me... :-)
> 
>> * <opinion>Attributes work well for atomic values e.g. driver types and
>> option names.</opinion>
> 
> <opinion assertedas="fact">Agreed.</opinion>
> 
>> <WriterPipeline>
>>    <Writer type="drivers.oci.writer">
>>        <Option name="debug">true</Option>
>>        <Reader type="drivers.las.reader">
>>            <Option name="filename">in.las</Option>
>>        </Reader>
>>    </Writer>
>> </WriterPipeline>
> 
> Yup, that's basically what I had when I started the project -- but then I
> found out that boost::property_tree doesn't serialize to XML attrs quite as
> cleanly as I'd like.  I'm going to revisit that issue this afternoon, I
> think.

I agree that our pipeline XML isn't optimal, and we should move it toward something sane earlier rather than later.  Pete, when you get some time, can you help me cook up an XSD that we can use to externally validate our pipelines?  I'll work to implement it.

Howard