set_meta
Description:
Sets a new value
for an existing meta data item or adds a new item.
Meta data tag
names can be something like e.g. "comment". Supplying null for the value
will unset an existing value.
Parameters:
this | |
name |
preset name |
tag |
meta data item name |
value |
new value |
Returns:
true for success, false if e.g. there is no preset with that |