Tagboxes define interpretations of tag data and are responsible for processing tags to update one or more columns in a database table. A tagbox's run() method is given all relevant tags for a globj. It provides an API for creating tags and globjids. A sample tagbox calculates the mean tag ID for a project by summing all tag IDs and dividing by the number of tags.

2. Tagboxes
● A tagbox defines an interpretation of tag data
● Typically, a tagbox is responsible for 1 column
(or a few columns) in some table
● run() is given a list of all relevant tags on a globj

3. A Tagbox: Under the hood

4. Clout
● One-person one-vote is so 2001
● Defines a single orthogonal aspect of
“user importance” or “user value”
● Describe, Vote, Moderate

5. Miscellaneous
● Opposite tags: !
● nod, nix
● Admin tag commands: _ # ## ^ )

6. Most Basic API
● getGlobjidCreate(table_name, target_id)
● createTag(globjid, tagname)
Deactivates any opposites
Zeroes clout if admin-proscribed
Transactional

7. Sample Tagbox
#!/usr/bin/perl
package Slash::Tagbox::ProjectMeanTagid;
use Slash;
use base 'Slash::Tagbox';
sub get_affected_type { 'globj' }
sub get_clid { 'describe' }
sub init_tagfilters {
my($self) = @_;
$self->{filter_gtid} = $self->getGlobjTypes()->{projects};
}
sub run_process {
my($self, $affected_id, $tags_ar) = @_;
my $sum = 0; map { $sum += $_->{tagid} } @$tags_ar;
my $count = scalar(@$tags_ar);
my($type, $target_id) = $self->getGlobjTarget($affected_id);
$self->sqlUpdate('projects',
{ meantagid => $count ? $sum/$count : undef },
quot;id=$target_idquot;);
}