Deleting Tags
To remove tags from items, use the dtag
method.
There are two forms:
$canvas->dtag(tag
); $canvas->dtag(tag/id
,deltag
);
The first one searches for items with the specified tag and then
deletes the tag. The second searches for items that match the tag or
ID and then deletes the deltag
(if it exists) from
that item. This allows you to delete a subset of the tags, rather
than every single tag.
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