Schema Element for EventClass (ADF)
Contains elements that define event class fields.
Синтаксис
<EventClasses>
<EventClass>
...
<Schema>
Element Characteristics
| Characteristic | Description |
|---|---|
Data type |
None. |
Default value |
None. |
Occurrence |
Required once per EventClass element. |
Updates |
Cannot be added or deleted when updating the application. |
Element Relationships
| Relationship | Elements |
|---|---|
Parent element |
|
Child elements |
Замечания
An event class schema defines an event class table in the application database. Notification Services automatically adds ID columns to this definition when creating the database table.
Пример
The following example shows a Schema element that creates two event fields: a 10-character stock symbol field, and a stock price field that accepts monetary data.
<Schema>
<Field>
<FieldName>StockSymbol</FieldName>
<FieldType>char(10)</FieldType>
<FieldTypeMods>NOT NULL</FieldTypeMods>
</Field>
<Field>
<FieldName>StockPrice</FieldName>
<FieldType>money</FieldType>
<FieldTypeMods>NOT NULL DEFAULT 10</FieldTypeMods>
</Field>
</Schema>
См. также
Справочник
Application Definition File Reference
Другие ресурсы
Определение свойств основного класса событий
Обновление экземпляров и приложений