[greenstone-users] trouble with mgpp

From jraynor
DateThu, 15 Apr 2004 14:10:16 -0400
Subject [greenstone-users] trouble with mgpp
I am trying to build a collection of archival photographs, and am having
trouble with mgpp.

The documents being collected are all simply JPEG images.

I put all of the metadata elements in a separate "metadata.xml" file, to be
added to the individual documents with RecPlug's "-use_metadata_files" option.

Each of the photographs already has a caption, so I created a metadata element
called "Caption" to put it in.

These captions, however, leave much to be desired (they're not descriptive
enough to be useful for keyword-searching) so I added a second metadata
element called "Keywords".

Each photograph has a negative number, which I'm putting in the "Title"
metadata element. This fact, however, is to be concealed from the users (note
the "collectionmeta" statement which renames "Title" as "negative number" in
the drop-down menu of searchable indexes).

Here is one entry from the "metadata.xml" file:

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<Metadata name="Title" mode="override">02632a</Metadata>
<Metadata name="Caption" mode="override">R. I. Red Festival.</Metadata>
<Metadata name="Keywords" mode="override">exterior cooking
<Metadata name="Date" mode="override">20010625</Metadata>

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I would like users to be able to search for keywords *both* the *Caption*
field and the *Keywords* field at once, and have thus opted to use mgpp's
"allfields" option to create a searchable master index.

Here's the problem:

Right now, I *can* search the "allfields" index for titles (e.g. searching for
"02632a" yields the document whose metadata is shown above).

However, searching the "allfields" index for anything that I know to be in a
Keywords or Caption metadata element (e.g. "Red" or "cooking" from the example
provided above) yields absolutely *nothing*.

I'm very puzzled.

The only explanation that I can think of is that mgpp is confused by
non-standard metadata elements (neither "Comment" nor "Keywords" correspond to
anything in the Dublin Core). On the other hand, Greenstone seems to be
perfectly capable of sorting the documents alphabetically by Caption
("classify AZList -metadata Caption" is working nicely).

Any help would be most gratefully appreciated! Thanks!

Here is the collection's configuration file:

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creator jraynor@mail.uri.edu
maintainer jraynor@mail.uri.edu
public true

searchtype plain form
indexes Title allfields
collectionmeta .Title "negative number"
collectionmeta .allfields "keyword"

plugin ImagePlug
plugin GAPlug
plugin ArcPlug
plugin RecPlug -use_metadata_files

classify AZList -metadata Title
classify AZList -metadata Caption
classify DateList

collectionmeta collectionname "ArcPhot April 13th Number 1"
collectionmeta iconcollection ""
collectionmeta collectionextra "This is just the April 7th version, with
mgpp instead of mg."

format VList "<td>[link][icon][/link]</td>
<td valign=top><b>Negative Number:</b>
[Title]<br><b>Caption:</b> [Caption]<br><b>Added Keywords:</b>
[Keywords]<br><b>Date:</b> [Date]</td>"

format DocumentText '<center><table>
<tr><td><img src="/gsdl/collect/gsarch/index/assoc/[assocfilepath]/[Image]">
<br>Negative Number: [Title]<br>Caption:[Caption]<br>Keywords:
[Keywords]<br>Date: [Date]
format DocumentButtons ""