[occi-wg] XML rendering

[Augusto Ciuffoletti]

Ah! Going functional!


2013/12/11 Jean Parpaillon <jean.parpaillon at free.fr>

> Hi Augusto,
> I can only answer quickly on some points. I will have an eye to your xml
> file later, sorry.
> Comments inside:
>
> Le mardi 10 décembre 2013 à 17:43 +0100, Augusto Ciuffoletti a écrit :
> > Hi Jean,
> >
> >
> > I have completed the exercise of translating to XML the example in the
> > document (compose.pdf). There is one XML that describes the mixins
> > specific for the provider (example.xml), and the xml document that
> > describes the entities that implement the example in the document
> > (occi-monitoring-example.xml). They are uploaded in the "monitoring"
> > branch.
> >
> >
> > I have left your comments in the occi-monitoring-example.xml
> > complaining about the fact that mixin attributes "melt" into the
> > resource in a completely opaque way. On my side, I add that it is also
> > impossible to characterize an attribute with any sort of semantic (in
> > my case, input, control, metric).
> >
> >
> > About the occi.xsd document:
> >
> >
> > -) line 113: amyURI instead of anyURI
> >
> >
> > -) the attribute type
> >
> >     <xs:complexType name="attributeType">
> >         <xs:sequence>
> >             <xs:element name="value" type="xs:anyURI" minOccurs="0"
> >                 maxOccurs="unbounded">
> >             </xs:element>
> >         </xs:sequence>
> >         <xs:attribute name="name" type="xs:string"></xs:attribute>
> >         <xs:attribute name="value" type="xs:string"></xs:attribute>
> >     </xs:complexType>
> >
> >
> > The two attributes are ok (name+value) but the unbounded sequence of
> > URIs puzzles me: what is its meaning exactly.
>
> I think it is useful to have 2 forms of attributes:
> 1/ when attributes have single value:
>   <occi:attribute name="occi.ext.attr1" value="value1" />
> 2/ when attributes have multiple values:
>   <occi:attribute name="occi.ext.attr2" >
>     <occi:value>value1</occi:value>
>     <occi:value>value2</occi:value>
>   </occi:attribute>
> But I must admit I don't remember why I've limited to xs:anyURI... :)
>
> I remember a discussion in CompatibleOne project where we expressed the
> need for referring to a resource as an attribute value. This could be
> achieved in XML with allowing 'href' or 'xref' xml attribute instead if
> 'value' xml attribute.
>
> I will update the xsd ASAP.
>
> > And, overall, this is not the "attribute" as defined in the core
> > model, upper right corner of fig. 2: this is represented as the
> > "attributeSpecType", right? Is there a relationship between the two? I
> > guess no.
> >
>
> You're right, in the XSD, I separate the attributeSpecType from
> attributeType, the latter representing an instance of the former.
> Basically, you will find attributeSpecType in kind, mixin or action
> definition, while attributeType in resource or link.
>
> > Also: I have not found an easy way to test the example: do you have an
> > inexpensive suggestion for me?
> >
>
> I am currently writing an OCCI implementation in erlang which read OCCI
> API definition in XML file. Unfortunately, it is not ready yet. If you
> want to check it out, you will only be able to read the xml file and
> expose the categories at query url (in json or text/plain).
> Code is here: http://github.com/jeanparpaillon/erocci
>
> Of course, any contribution welcome, but I'm more focusing on finishing
> the first implementation rather than documenting or stabilizing APIs....
>
>
> Regards,
> Jean
>
> >
> > Bye!
> >
> >
> > Augusto
> >
> >
> >
> > PS: ah, is there interest regarding XMPP?
> >
> > --
> > Augusto Ciuffoletti
> > Dipartimento di Informatica
> > Università di Pisa
> > 56100 - Pisa (Italy)
>
> --
> Jean Parpaillon
> Open Source Consultant
> Phone: +33 6 30 10 92 86
> im: jean.parpaillon at gmail.com
> skype: jean.parpaillon
> linkedin: http://www.linkedin.com/in/jeanparpaillon/en
>
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>



-- 
Augusto Ciuffoletti
Dipartimento di Informatica
Università di Pisa
56100 - Pisa (Italy)
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