Bug 141709 The Interface "IScalarParameterModel" should provide a "TEXT_ID_PROP" member.
In order to provide the "Localization" function in Property Editor of Parameter, it requires to implement a "ScalarParameterI18nPage" Class similar to the Class of "LabelI18nPage", and it consequently needs to "IScalarParameterModel" provide a "TEXT_ID_PROP" member for "ScalarParameterHandle" Class.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ScalarParameterHandle.java
{
		return getStringProperty( ScalarParameter.DEFAULT_VALUE_PROP );
	}
	/**
	 * Sets the default value of the parameter. The default value can be an
	 * expression, but cannot reference any other parameters.
	 * 
	 * @param defaultValue
	 *            the default value for the parameter
	 * @throws SemanticException
	 *             if the property is locked.
	 */
	public void setDefaultValue( String defaultValue ) throws SemanticException
	{
		setProperty( ScalarParameter.DEFAULT_VALUE_PROP, defaultValue );
	}
	/**
	 * Tests whether hides the user's entry by displaying asterisks. Often used
	 * for passwords.
	 * 
	 * @return <code>true</code> if hides the user's entry by asterisks,
	 *         <code>false</code> if shows characters as usual.
	 */
	public boolean isConcealValue( )
	{
		return getBooleanProperty( ScalarParameter.CONCEAL_VALUE_PROP );
	}
	/**
	 * Sets the attribute that's hides the user's entry by displaying asterisks.
	 * Often used for passwords.