One home for each result and term

This guide is about where, among a map's internotes, each worked result and each term is written. What a map is, and how one is made, is on Maps.

#Each worked result derived once

When several internotes in a map work with one data set, each tends to work the data through to whatever its own topic needs, and the workings overlap. In a regression course built on one shared data set, the full model's fit, one observation's leverage, and the comparison of the full model with a reduced one were each derived in more than one internote. A reader who follows the tree meets the same derivation two or three times, each time presented as new.

So each worked result has one home: the internote whose topic it is derives it, and every other internote quotes the result and links there. Deciding the homes before the internotes are written is what prevents the overlap; trimming afterwards in that course still left two derivations repeated.

The near-constant sum of the four percentages is derived in
!internote(ref: ./relationships-between-several-variables.chalk); here it is quoted, not worked again.

#Each term defined once

A map's glossary gathers every definition in its internotes, sorted by term. Two definitions of one term both appear, side by side, each linking to a different internote, and the reader is left to work out whether they differ. Each term is defined in one internote, the one whose topic it belongs to, and the others use it and link there.

How the definition itself is written, for a reader who meets it in the glossary, is in Callouts.