Re: "metadata" as implicit resource type format?

solproviderapache.org schrieb:
> On 3/24/08, Andreas Hartmann <andreasapache.org> wrote:
>>  IMO the concept of resource type formats has
proven very useful and
>>  convenient. Maybe it makes sense to introduce
implicit formats which
>>  don't depend on a particular resource type but
work with all documents?
>>  A first candidate might be the
"metadata" format:
>>   
lenya-document:…,pub=…,area=…,lang=…?format=metadata

>>  would return the XML format of the
LenyaMetaDataGenerator.
>>
>>  WDYT?
>>  -- Andreas
> 
> The lenya-document protocol seems to provide some of
the functionality
> of Lenya-1.3's content: protocol with its three
"formats": DATA, INFO,
> and META.
> - DATA is the Resource.
> - INFO is the XML version of a Resource.  The output is
identical to
> DATA if the Resource contains XML.  This format is
useful to retrieve
> internal information of binary files.
> - While the first two formats handle specific
Revisions, META returns
> XML for the entire Resource including all Translations
and Revisions.

In 2.0, formats were introduced as presentation options of a
document 
(to be displayed as a stand-alone version or to be embedded
in a complex 
page etc.). Each resource type can declare an arbitrary set
of formats. 
Examples are

- xhtml
- teaser
- rss
- xslfo
- ...

The concept has been used for some "unusual"
applications, e.g. there 
are format conventions for the sitetree icon and for the
Lucene index 
document. Maybe it makes sense to add another convention for
the metadata.


> When using the term "metadata", are you
referring to internal
> information or to lenya:meta information from
Resources' XML?

In 2.0, the meta data are stored outside the document. You
can define 
arbitrary element sets. The core includes the Dublin Core
elements and 
terms and some meta data for internal use (resource type
name, source 
extension etc.). Some resource types (e.g.
"resource" for binary files) 
add their own specific meta data.

-- Andreas


-- 
Andreas Hartmann, CTO
BeCompany GmbH
http://www.becompany.ch
Tel.: +41 (0) 43 818 57 01


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