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From "Jukka Zitting (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (TIKA-774) ExifTool Parser
Date Wed, 09 Nov 2011 22:41:52 GMT

    [ https://issues.apache.org/jira/browse/TIKA-774?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13147342#comment-13147342
] 

Jukka Zitting commented on TIKA-774:
------------------------------------

Some notes:

* We already have existing places for metadata schemas like Dublin Core and XMPDM. It would
be better if the new metadata properties you're adding were located next to the already existing
similar properties instead of in the separate new ExifTool interface.

* We already have parsers for JPEG, PNG and TIFF. Instead of adding a conflicting new parser
for the same formats, it would be better if the existing parsers could be extended with this
new functionality.
                
> ExifTool Parser
> ---------------
>
>                 Key: TIKA-774
>                 URL: https://issues.apache.org/jira/browse/TIKA-774
>             Project: Tika
>          Issue Type: New Feature
>          Components: parser
>    Affects Versions: 1.0
>         Environment: Requires be installed (http://www.sno.phy.queensu.ca/~phil/exiftool/)
>            Reporter: Ray Gauss II
>              Labels: features, newbie, patch,
>             Fix For: 1.1
>
>         Attachments: testJPEG_IPTC_EXT.jpg, tika-core-exiftool-parser-patch.txt, tika-parsers-exiftool-parser-patch.txt
>
>
> Adds an external parser that calls ExifTool to extract extended metadata fields from
images and other content types.
> In the core project:
> An ExifTool interface is added which contains Property objects that define the metadata
fields available.
> An additional Property constructor for internalTextBag type.
> In the parsers project:
> An ExiftoolMetadataExtractor is added which does the work of calling ExifTool on the
command line and mapping the response to tika metadata fields.  This extractor could be called
instead of or in addition to the existing ImageMetadataExtractor and JempboxExtractor under
TiffParser and/or JpegParser but those have not been changed at this time.
> An ExiftoolParser is added which calls only the ExiftoolMetadataExtractor.
> An ExiftoolTikaMapper is added which is responsible for mapping the ExifTool metadata
fields to existing tika and Drew Noakes metadata fields if enabled.
> An ElementRdfBagMetadataHandler is added for extracting multi-valued RDF Bag implementations
in XML files.
> An ExifToolParserTest is added which tests several expected XMP and IPTC metadata values
in testJPEG_IPTC_EXT.jpg.

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