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http://issues.apache.org/jira/browse/NUTCH-192?page=comments#action_12365450 ] 

Doug Cutting commented on NUTCH-192:
------------------------------------

Sorry, I misspoke and overstated things too.  There are problems, but not with 
MapWritable, rather with WritableName: this refers to some Nutch classes that 
are not in Hadoop.  Aside from that, I agree that MapWritable could be 
generally useful.  Sorry I wasn't thinking clearly when I made my previous 
comment.


> meta data support for CrawlDatum
> --------------------------------
>
>          Key: NUTCH-192
>          URL: http://issues.apache.org/jira/browse/NUTCH-192
>      Project: Nutch
>         Type: Improvement
>     Versions: 0.8-dev
>     Reporter: Stefan Groschupf
>      Fix For: 0.8-dev
>  Attachments: metadata010206.patch, metadata060206.patch, 
> metadata300106.patch, metadata310106.patch
>
> Supporting meta data in CrawlDatum would help to get a set of new nutch 
> features realized and makes a lot possible to smaller special focused search 
> engines.

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