[occi-wg] Syntax for attributes on links

[Roger Menday]

Hi all,

> The original example was:
>
>> <link href="urn:uuid:4cc8cf62-69a4-4650-9e8c-7d4c516884df"
>>      rel="http://purl.org/occi/storage#device" title="Hard Drive"/>
>
> And as I said before, we also need a device identifier at which to  
> connect
> the storage, making it something like:
>
>> <link type="ide:0:0" href="urn:uuid:4cc8cf62-69a4-4650-9e8c-7d4c516884df 
>> "
>>      rel="http://purl.org/occi/storage#device" title="Hard Drive"/>

Shouldn't these href's be HTTP URIs so I know where to go to find out  
some more about the storage device (in this case) ? And then, visiting  
the home of the storage device, I get some more (typed) links I can  
follow to other other things the storage is related to ... i.e.  
navigating the graph.

(?)

Roger

>
> which mapped to JSON as:
>
>> "link":[
>>  {
>>    "type":"ide:0:0"
>>    "rel":"http://purl.org/occi/storage#device",
>>    "href":"urn:uuid:4cc8cf62-69a4-4650-9e8c-7d4c516884df",
>>    "title":"Hard Drive"
>>  }
>> ]
>
>
> I still believe that the "link" here is a figment of conversion from  
> the
> Atom XML format. To write this in something more like native JSON,  
> I'd go
> with:
>
> "ide:0:0": {
>  "href":"urn:uuid:4cc8cf62-69a4-4650-9e8c-7d4c516884df",
>  "title":"Hard Drive"
> }
>
> since the device identifier is unique for the VM, and clearly  
> specifies this
> as a place where storage is being attached.
>
>
>
> In text format, I'd flatten this data structure as:
>
> ide:0:0|href|4cc8cf62-69a4-4650-9e8c-7d4c516884df
> ide:0:0|title|Hard Drive
>
> or even just:
>
> ide:0:0|4cc8cf62-69a4-4650-9e8c-7d4c516884df
> ide:0:0|title|Hard Drive
>
> Rather than the original:
>
> link|ide:0:0|http://purl.org/occi/storage#device|Hard Drive|urn:uuid:4cc8cf62-69a4-4650-9e8c-7d4c516884df
>
>
> This is rather cleaner in terms of not having to know what all the  
> possible
> attributes might be, and where they appear in the |-deliminated list.
>
> Cheers,
>
> Richard.
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> occi-wg at ogf.org
> http://www.ogf.org/mailman/listinfo/occi-wg


Roger Menday (PhD)
<roger.menday at uk.fujitsu.com>

Senior Researcher, Fujitsu Laboratories of Europe Limited
Hayes Park Central, Hayes End Road, Hayes, Middlesex, UB4 8FE, U.K.
Tel: +44 (0) 208 606 4534


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