[libextractor] Info about libextractor and extract on Fedora core

[Ambrogio]

Hi,
I'm trying to use the extract command to obtain metadata about files.
I'm working on a Linux User Group in Italy to obtain a little archiver
of metadata.

The problem is that I'm unable to use extract on my fedora core 6, using
the package from my distro.

The rpm installed on my PC are:
libextractor-0.5.17a-1.fc6.x86_64.rpm
libextractor-devel-0.5.17a-1.fc6.x86_64.rpm
libextractor-plugins-0.5.17a-1.fc6.x86_64.rpm
libextractor-plugins-base-0.5.17a-1.fc6.x86_64.rpm
libextractor-plugins-exiv2-0.5.17a-1.fc6.x86_64.rpm
libextractor-plugins-ogg-0.5.17a-1.fc6.x86_64.rpm
libextractor-plugins-ole2-0.5.17a-1.fc6.x86_64.rpm
libextractor-plugins-pdf-0.5.17a-1.fc6.x86_64.rpm
libextractor-plugins-thumbnailgtk-0.5.17a-1.fc6.x86_64.rpm
libextractor-plugins-thumbnailqt-0.5.17a-1.fc6.x86_64.rpm

and the extract version is extract v0.5.17a

When I try to execute the sample about the index page on Linux Journal I
obtain nothing.
extract index.html (no response)
exiftool index.html

        ExifTool Version Number         : 6.77
        File Name                       : index.html
        Directory                       : .
        File Size                       : 32 kB
        File Modification Date/Time     : 2007:06:16 19:36:21
        File Type                       : HTML
        MIME Type                       : text/html
        Title                           : Linux Journal |
        Content Type                    : text/html; charset=utf-8

I searched something by google, but it's very hard to find something
about a so common word like extract.

Do you know about problems (or required packages) on Fedora Core 6?

Tnx in advance for your attention, and tnx above all for your job.

Ambrogio