How to use "type and date" in query

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How to use "type and date" in query

Davide.D'ALESSANDRO
Hi all,
 
I cannot have this 2 working, and I don't know why.
I'm using Nutch 0.8.1 .
 
 1. Added support for "type:" in queries. Search results are limited/qualified
    by mimetype or its primary type or sub type. For example,
    (1) searching with "type:application/pdf" restricts results
    to pages which were identified to be of mimetype "application/pdf".
    (2) with "type:application", nutch will return pages of
    primary type "application".
    (3) with "type:pdf", only pages of sub type "pdf" will be listed.
    (John Xing, 20050120)
 
 2. Added support for "date:" in queries. Last-Modified is indexed.
    Search results are restricted by lower and upper date (inclusive)
    as date:yyyymmdd-yyyymmdd. For example, date:20040101-20041231
    only returns pages with Last-Modified in year 2004.
    (John Xing, 20050122)
 
Thanks a lot for your help!