Re: [Exist-development] Metadata in eXist

[Adam R. <ad...@ex...>]

> I like the idea of metadata axis. Your proposal for name/value pairs is
> simple and it can accommodate most of variations we may need.

Keep in mind that a value would be either an atomic value or a
sequence; of XML Schema Data Type.


>> Accessing this metadata at the moment is possible via the image xquery
>> extension module.
>
>
> Actually the the existing image module gives vary limited metadata: hight,
> width and image type.
> It will really love to have all EXIF properties of an image as searchable
> metadata fields.

Well we could very easily integrate the JpegParser from Apache Tika
into the Image metadata function...

> What will be the format of the metadata if we request all available pairs?
> May be an element with all metadata pairs as attributes.

I am not sure at the moment, some sort of serialized xml format perhaps -

e.g.

/metadata::*

<metadata xmlns="http://exist-db.org/metadata">
   <key name="someKey">
      <value type="xs:string">hello world</value>
   </key>
   <key name="otherValue">
     <value type="node()">
      <a xmlns=""><b/></a>
     </value>
   </key>
</metadata>


-- 
Adam Retter

eXist Developer
{ United Kingdom }
ad...@ex...
irc://irc.freenode.net/existdb