### 1.1.60 PropertySet

Set a context property.

Syntax: `\set context.prop = scheme-val`

Properties:

> `iterator-ctor` (procedure):

>   `ly:property-iterator::constructor`

>   Function to construct a `music-event-iterator` object for this music.

> `name` (symbol):

>   `'PropertySet`

>   Name of this music object.

> `types` (list):

>   `'(layout-instruction-event general-music)`

>   The types of this music object; determines by what engraver this music expression is processed.

> `untransposable` (boolean):

>   `#t`

>   If set, this music is not transposed.

#### Internals Reference v2.18.2 (稳定分支).