Re: [thredds] Nesting serviceType="Compound"??

• To: Nathan Potter <ndp@xxxxxxxxxxx>
• Subject: Re: [thredds] Nesting serviceType="Compound"??
• From: Ethan Davis <edavis@xxxxxxxxxxxxxxxx>
• Date: Wed, 02 Dec 2009 10:21:19 -0700

Hi Nathan,

>From the spec:

    "An access element ... always refers to the dataset that
    it is immediately contained within."

http://www.unidata.ucar.edu/projects/THREDDS/tech/catalog/v1.0.2/InvCatalogSpec.html#access

Also, an access element can only be contained in a dataset element, not
in a metadata element. All access elements MUST contain a "urlPath"
attribute.

Ethan


Nathan Potter wrote:
> 
> 
> Ethan,
> 
> Along the same lines then, can <access> elements be inherited? Or is it
> bound only to the containing dataset and never to that dataset's children?
> 
> Example:
> 
>   <dataset name="level1" ID="SingleFileWcs">
>     <metadata inherited='true'>
>        <access serviceName=dap />
>     </metadata>
>     <dataset name="level2_a" urlPath="wcs/foo" ID="wcs/foo" />
>     <dataset name="level2_b" urlPath="wcs/foo" ID="wcs/foo" >
>        <serviceName>otherService</serviceName>
>     </dataset>
>   </dataset>
> 
> 
> N
> 
> 
> On Dec 1, 2009, at 1:18 PM, Ethan Davis wrote:
> 
>> Hi Nathan,
>>
>> Nathan Potter wrote:
>>>
>>> Another question, about service inheritance.
>>>
>>> Example:
>>>
>>>   <dataset name="level1" ID="SingleFileWcs">
>>>       <serviceName>dap</serviceName>
>>>
>>>        <dataset name="level2_a" urlPath="wcs/foo" ID="wcs/foo" />
>>>        <dataset name="level2_b" urlPath="wcs/foo" ID="wcs/foo" >
>>>           <serviceName>otherService</serviceName>
>>>        </dataset>
>>>   </dataset>
>>>
>>>
>>> Is the dataset "level2_a" associated with the "dap" service??
>>
>> No. Though it would be if the "dap" serviceName element were enclosed in
>> an inherited metadata element, like this
>> <metadata inherited='true'><serviceName>dap</serviceName></metadata>
>>
>>> Is the dataset "level2_b" associated with the "dap" service??
>>
>> No. Not even if the "dap" serviceName was inherited, because the
>> "otherService" association overrides any inherited association.
>>
>>> Is the dataset "level2_b" associated with the "otherService" service??
>>
>> Yes, it is.
>>
>> Ethan
>>
>>>
>>>
>>> Nathan
> 
> = = =
> Nathan Potter                        ndp at opendap.org
> OPeNDAP, Inc.                        +1.541.231.3317
> 
> 
> 

• References:
  • [thredds] Nesting serviceType="Compound"??
    • From: Nathan Potter
  • Re: [thredds] Nesting serviceType="Compound"??
    • From: Nathan Potter
  • Re: [thredds] Nesting serviceType="Compound"??
    • From: Ethan Davis
  • Re: [thredds] Nesting serviceType="Compound"??
    • From: Nathan Potter
  • Re: [thredds] Nesting serviceType="Compound"??
    • From: Ethan Davis
  • Re: [thredds] Nesting serviceType="Compound"??
    • From: Nathan Potter