4.1.3 Naming conventions of objects and properties

We met some object naming conventions previously, in Contexts and engravers. Here for reference is a list of the most common object and property types together with the conventions for naming them and a couple of examples of some real names. We have used ‘A’ to stand for any capitalized alphabetic character and ‘aaa’ to stand for any number of lower-case alphabetic characters. Other characters are used verbatim.

Object/property type

Naming convention



Aaaa or AaaaAaaaAaaa

Staff, GrandStaff

Layout Objects

Aaaa or AaaaAaaaAaaa

Slur, NoteHead



Clef_engraver, Note_heads_engraver



grob-interface, break-aligned-interface

Context Properties

aaa or aaaAaaaAaaa

alignAboveContext, skipBars

Layout Object Properties

aaa or aaa-aaa-aaa

direction, beam-thickness

As we shall see shortly, the properties of different types of object are modified by different commands, so it is useful to be able to recognize the type of object from the names of its properties.

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