I needed a simple way to test if a list of keywords (tags) had the required words, but one moment later, conditional operators other than AND were required. I didn't find a public module that satisfied my needs. Some of this was discussed in AND and OR on Regular Expressions.

I took my subs and group them in a module, then changed into objects (my first attempt in OOP) and worked nice.

Examples of use:

# Simple query (same as: +xxx -ppp -jjj):
my $query = "xxx-(ppp,jjj)";

use Keywords;
my $kw = Keywords->new(ignorecase => 1);
$kw->prepare($query);

# Simple test:
print "Match!" if $kw->test($list_of_tags);

# @ids has some keys %table:
@ok = grep {$kw->test($table{$_}[$col])} @ids;

# Same as before:
@ok = $kw->grep_keys(map {$_ => $table{$_}[$col]} @ids);

# Hash only has keywords lists:
@ok = $kw->grep_keys(%tags);

# When ids are full keywords:
@ok = $kw->grep(@ids);

[download]

Now, I want to share my efforts and decided to upload this to CPAN, but I need to define or append to a namespace. I thought on Search::Keywords, but Keywords::Match might be a better one.

Hints for a proper namespace?

Hints for extra features? I'm thinking on set/get parms, reparse, sentences (when tags have more than one word), UTF8 (un)support...

Thanks!

In reply to RFC: A module to evaluate keywords expressions on tag lists. by vitoco

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