Simple value

As explained in Building User-Friendly DSLs

A value that is not an object or a collection of objects, including text, numbers, Booleans, and null.

A simple value is anything that is not an object or a collection of objects. Strings, numbers, Booleans, enumerated values, and null qualify; null represents missing or optional content. section 2.1

Objects store simple settings such as name="Foo", where a property receives a simple value. The term distinguishes these settings from other kinds introduced later. section 2.1

Figure 2.3 A simple ORD containing only one object, with annotations

Use the annotated object diagram to locate simple settings and their values. section 2.1

How Building User-Friendly DSLs covers it

How deep it goes

Defines the category and lists its cases, but defers other setting kinds to later treatment.

Examples

Uses name="Foo", strings, numbers, Booleans, enumerated values, and null as concrete examples.

What you can do after

Evaluate whether a value belongs to the simple-value category and represent missing content with null.

How it connects

Connects simple values with objects, collections, properties, settings, and null.

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