created: 20150123220223000
modified: 20150124185028000
tags: Concepts
title: Dominant Append
type: text/vnd.tiddlywiki

[[Filters]] manipulate [[sets of titles|Title Selection]] in which no title may appear more than once. Furthermore, they often need to append one such set to another.

This is done in such a way that, if a title would be duplicated, the earlier copy of that title is discarded. The titles being appended are dominant.

For example, if a selection contains `Andrew Becky Clara Daniel` and `Andrew Barney Clara Daisy` is then appended to it, the result is `Becky Daniel Andrew Barney Clara Daisy`.