[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: orthogonality (was Re: New attempt)



----- Original Message -----
From: "Benno Blumenthal" <address@hidden>
To: "John Caron" <address@hidden>
Sent: Thursday, June 06, 2002 2:09 PM
Subject: Re: orthogonality (was Re: New attempt)


> Hi John,
>
> access and entry are not peer elements:  access is subordinate to entry.
>
>
> The point we wanted to make is that an entry exists whether or not it can
be
> accessed, and there can be a number of different accesses for an given
> entry.    If that number is zero, you call it a collection, if that number
is
> greater than zero, you call it a dataset, if you want the things that you
are
> talking about to be independent of protocol, you call them the same thing,
in
> this case entry.
>
> Personally, I think the case is overwhelming that collection be dropped.
Makes
> more sense to call what is left a dataset than an entry, but obviously it
is
> isomorphic to what is needed, so for a machine readable document I can
hardly
> complain.
>
> Benno

I sympathize with this design, but there are a number of subtle issues that
I think we need to clarify before we commit to it. Lets follow your line of
thought, and modify Joe's example to use dataset where he uses entry:

<catalog>
<service name="X"/>
<service name="Y"/>
...

<dataset name="my_dataset">

    <metadata name="global-metadata" url="..."/>
    <access name="global-X-access"/>

    <dataset name="monthly-data">
      <metadata name="monthly-metadata" url="..."/>
      <access name="X-with-COARDS" serviceType="X" url="..."/>
      <access name="X-with-no-COARDS" serviceType="X" url="..."/>
      <access name="X-flattened-to-2D" serviceType="X" url="http://..."/>
      <access name="Y" serviceType="Y" url="..."/>
      ....
    </dataset>

</dataset>

What is the relationship (if any) between the peers

    <access name="global-X-access"/>
    <dataset name="monthly-data">

The same question asked in a different way:

What is the meaning that <dataset name="monthly-data"> is contained in
<dataset name="my_dataset">. Do we expect monthly-data to be a subset of
my_dataset?  Do we expect that <access name="X-with-COARDS"/> is some kind
of subset of <access name="global-X-access"/>




NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.