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<h4 class="subsection">4.1.3 Naming conventions of objects and properties</h4>
<p>We met some object naming conventions previously, in
<a href="Contexts-and-engravers.html#Contexts-and-engravers">Contexts and engravers</a>. 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.
<p><table summary=""><tr align="left"><th valign="top" width="33%">Object/property type
</th><th valign="top" width="33%">Naming convention
</th><th valign="top" width="33%">Examples
<br></th></tr><tr align="left"><td valign="top" width="33%">Contexts
</td><td valign="top" width="33%">Aaaa or AaaaAaaaAaaa
</td><td valign="top" width="33%">Staff, GrandStaff
<br></td></tr><tr align="left"><td valign="top" width="33%">Layout Objects
</td><td valign="top" width="33%">Aaaa or AaaaAaaaAaaa
</td><td valign="top" width="33%">Slur, NoteHead
<br></td></tr><tr align="left"><td valign="top" width="33%">Engravers
</td><td valign="top" width="33%">Aaaa_aaa_engraver
</td><td valign="top" width="33%">Clef_engraver, Note_heads_engraver
<br></td></tr><tr align="left"><td valign="top" width="33%">Interfaces
</td><td valign="top" width="33%">aaa-aaa-interface
</td><td valign="top" width="33%">grob-interface, break-aligned-interface
<br></td></tr><tr align="left"><td valign="top" width="33%">Context Properties
</td><td valign="top" width="33%">aaa or aaaAaaaAaaa
</td><td valign="top" width="33%">alignAboveContext, skipBars
<br></td></tr><tr align="left"><td valign="top" width="33%">Layout Object Properties
</td><td valign="top" width="33%">aaa or aaa-aaa-aaa
</td><td valign="top" width="33%">direction, beam-thickness
<br></td></tr></table>
<p>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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