Adding a tag property for the measure object

I'm thinking about providing the "copy&link-paste" functionality (see my previous suggestion) by means of a plugin, but right from the initial thought , I felt the need for a "tag" property in the measure object so that a group of measures could be identified in the program. Then, for example, all measures with the same tag would be considered "linked" for editing purposes. This tag could be an integer or a string. I think both variable types would do as well. Another way would be to provide a "link table" object that would list the linked measures by their indexes. Still a third way would be to provide for non-volatile variables (an array, in this case) permanently attached to the score once created, that would persist after the score is closed. Once the score is open again, the link array could be read by the plugin, to determine which measures are the linked ones. I'm asking about such type of variables in the forum, simultaneously.