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This is documentation for Caché & Ensemble.

For information on converting to InterSystems IRIS, see the InterSystems IRIS Adoption Guide and the InterSystems IRIS In-Place Conversion Guide, both available on the WRC Distributions page (login required).

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Data Type Classes

Define properties to contain literal values.

Background Information

Data type classes enable you to enforce sets of rules about the values of literal-valued properties. InterSystems provides an extensible set of data type classes. Each data type class has the following features:

  • It specifies values for compiler keywords. Among other things, these control how the property is projected to SQL, ODBC, ActiveX, and Java clients.

  • It specifies values for property parameters.

  • It provides a set of methods to translate data among the stored (on disk), logical (in memory), and display formats.

Available Tools

%Library package

Provides many data type classes. For a table that lists them, see “Data Types” in Using Caché Objects.

Availability: All namespaces.

%MV.Date class

Represents a MultiValue date.

See Also