Advanced topics in data integration 433
■ Required: This is a Boolean value that determines whether this field is required to have a
non-null value. Validation fails if
required=true but no value has been set.
■ Read-Only: This is a Boolean value that determines whether this field can receive new
values through data binding. If
readonly=true, then executing any binding to this field
generates the invalid event, and the field changes.
Formatter settings Formatter settings are applied when a field’s value needs to be converted
to a string. This is often for display purposes, such as when a DataSet field is bound to the
text property of a Label or TextArea component. Formatter settings on a field are ignored
when that field is bound to something whose data type isn’t String.
■ Formatter: The name of the formatter to use when converting this field to String. This is
selected from a list of available formatters.
■ Formatter options: these additional settings affect the formatter. The settings are
presented in the Formatting Options dialog box, which appears when you select this item.
These settings vary according to formatter. For example, the Boolean formatter has
settings for the text that represents the
true and false values.
For a complete list of formatters, see “Schema formatters” on page 440.
Kind and Encoder settings The Kind and Encoder settings are used to activate certain
special features:
■ Kind: The Kind setting for this field. This is selected from a list of available Kind settings.
■ Kind options: Additional settings that affect the Kind setting. The settings are presented
in the Kind Options dialog box, which appears when you select this item. These settings
vary according to kind.
■ Encoder: The Encoder setting for this field, which is selected from a list of available
Encoder settings.
■ Encoder options: Additional settings that affect the encoder. The settings are presented in
the Encoder Options dialog box, which appears when you select this item. These settings
vary according to encoder.
For more information, see “Using kinds and encoders” on page 434, “Schema kinds”
on page 436, and “Schema encoders” on page 437.
NOTE
If you don't specify a formatter, then a default conversion is applied when a field's
value is needed as a string.
To Next Page
Loading...