RSpec extension help

[Tom Mitchell]

Hi,

I'm trying to write an RSpec extension and I need a little help. I'd like to add a new tag within the services tag of a node in the GENI v3 request RSpec. I intend for it to work like this:

<?xml version="1.0" encoding="UTF-8"?>

<rspec xmlns="http://www.geni.net/resources/rspec/3"

       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

       xmlns:orca="http://www.gpolab.bbn.com/internal/userdir/tmitchel"

       xsi:schemaLocation="http://www.geni.net/resources/rspec/3

                           http://www.geni.net/resources/rspec/3/request.xsd

                           http://example.com/rspec/extension/

                           http://example.com/rspec/extension/foo.xsd"

       type="request" >

  <node client_id="node">

    <services>

      <example:velocity_script>

#!/bin/sh

  wget http://www.geni.net/myconf.xml &gt; /tmp/wget.log

#

  wget http://www.geni.net/mysetup.sh &gt; /tmp/setup.log

      </example:velocity_script>

    </services>

  </node>

</rspec>

I followed along with http://www.protogeni.net/trac/protogeni/wiki/RSpecCreatingExtension and generated a RelaxNG Compact file for the tag:

default namespace = "http://example.com/rspec/extension/"

Services = element velocity_script { text }

start = Services

This works fine, except it doesn't require the tag to be a child of the services tag. That's where I've hit a wall. Here's my attempt, which doesn't seem to be doing what I want:

namespace geni = "http://www.geni.net/resources/rspec/3"

default namespace = "http://example.com/rspec/extension/"

RSpec = 

element geni:rspec {

 element geni:node { Node }*

}

Node = element geni:services { Services }

Services = element orca:velocity_script { text }

start = RSpec

Am I on the right track? Do you have suggestions or recommendations? Are there good (and short) examples I could look at?

My read of the ptop_extension and top_extension is that at least some of the tags, like "node_type" could get put anywhere. I haven't tested that theory, so it might be off base. Do you know?

Thanks a lot,

Tom

[Jonathon Duerig]

This is a limitation of the verification technology. There is no way in a
schema to put the 'context' where the outermost tag should go. See the
fourth paragraph on this page:

http://www.protogeni.net/trac/protogeni/wiki/RSpecExtensions2

This is not ideal, but as far as I know, there is no way to work around it
with standard tools

---
Broad audience or deep message: Pick one.

On Fri, 2 Mar 2012, Tom Mitchell wrote:

> Hi,
> I'm trying to write an RSpec extension and I need a little help. I'd like to
> add a new tag within the services tag of a node in the GENI v3 request
> RSpec. I intend for it to work like this:
>
> <?xml version="1.0" encoding="UTF-8"?>
> <rspec xmlns="http://www.geni.net/resources/rspec/3"

> ￜ ￜ ￜ ￜxmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> ￜ ￜ ￜ ￜxmlns:orca="http://www.gpolab.bbn.com/internal/userdir/tmitchel"
> ￜ ￜ ￜ ￜxsi:schemaLocation="http://www.geni.net/resources/rspec/3
> ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜhttp://www.geni.net/resources/rspec/3/request.xsd
> ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜhttp://example.com/rspec/extension/
> ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜ ￜhttp://example.com/rspec/extension/foo.xsd"
> ￜ ￜ ￜ ￜtype="request" >
> ￜ <node client_id="node">
> ￜ ￜ <services>
> ￜ ￜ ￜ <example:velocity_script>
> #!/bin/sh
> ￜ wget http://www.geni.net/myconf.xml &gt; /tmp/wget.log
> #
> ￜ wget http://www.geni.net/mysetup.sh &gt; /tmp/setup.log
> ￜ ￜ ￜ </example:velocity_script>
> ￜ ￜ </services>
> ￜ </node>
> </rspec>
>
>
> I followed alongwithï¿œhttp://www.protogeni.net/trac/protogeni/wiki/RSpecCreatingExtensionï¿œan

> d generated a RelaxNG Compact file for the tag:
>
> default namespace = "http://example.com/rspec/extension/"
> Services = element velocity_script { text }
> start = Services
>
>
> This works fine, except it doesn't require the tag to be a child of the
> services tag. That's where I've hit a wall. Here's my attempt, which doesn't
> seem to be doing what I want:
>
> namespace geni = "http://www.geni.net/resources/rspec/3"
> default namespace = "http://example.com/rspec/extension/"
>

> RSpec =ￜ
> element geni:rspec {
> ï¿œelement geni:node { Node }*