Compiler Keywords That Affect the Schema

The Required keyword affects the XML schema, by removing the minOccurs="0" attribute. For example, consider the following class:

Class Schema.PropKeywords Extends (%RegisteredObject, %XML.Adaptor)
{

Parameter XMLTYPENAMESPACE="mytypes";

Property Property1 As %String;

Property Property2 As %String [ Required ];

}

If we generate a schema for the namespace used here, we see the following:

<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema" xmlns:s="http://www.w3.org/2001/XMLSchema" 
elementFormDefault="qualified" targetNamespace="test">
  <complexType name="PropKeywords">
    <sequence>
      <element minOccurs="0" name="Property1" type="s:string"/>
      <element name="Property2" type="s:string"/>
    </sequence>
  </complexType>
</schema>

Note that the default for minOccurs is 1; that is, Property2 is required.

Note:

For compatibility reasons, %XML.ReaderOpens in a new tab does not check for required properties by default, but you can cause it to do so; see Checking for Required Elements and Attributes. Also by default, an InterSystems IRIS web service does not check for required properties, but you can cause it to do so; see Checking for Required Elements and Attributes.

No other property keywords affect the schema for data type classes.

Parameters That Affect XML Schemas

Default XSD Types for InterSystems IRIS Data Type Classes