leor

I am generating an XML schema that controls the inclusion of a logical expression in a program.

There are logical operator (https://en.wikipedia.org/wiki/Logical_connective):

- Unary (now only work with not) (force MaxOccurss=1 of LOGIC_VALUES)

- Binary (and,or) (force MaxOccurss=Unbounded of LOGIC_VALUES)

<?xml version="1.0" encoding="UTF-8"?>
    <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="unqualified">


    <xs:element name="LOGIC_EXPRESSION">
        <xs:complexType>
            <xs:all>
                <xs:element name="LOGIC_OPERATOR" type="TYPE_LOGIC_OPERATOR"/>
                <xs:element ref="LOGIC_VALUES"/>
            </xs:all>
        </xs:complexType>
    </xs:element>


    <xs:element name="LOGIC_VALUES">
        <xs:complexType>
            <xs:choice>
                <xs:element name="LOGIC_VALUE" minOccurs="1" maxOccurs="unbounded"/>
            </xs:choice>
        </xs:complexType>
    </xs:element>

    <xs:simpleType name="TYPE_LOGIC_OPERATOR">
        <xs:restriction base="xs:string">
            <xs:enumeration value="and"/>
            <xs:enumeration value="or"/>
            <xs:enumeration value="not"/>
        </xs:restriction>
    </xs:simpleType>


</xs:schema>

I need know:

- If possible in the restriction of logic operator you can force the maxOccur of Logic_Values (dynamic change of maxoccurs to other element)

- If it is possible to do, what should I use?

You are writting the next XML code:

   <?xml version="1.0" encoding="UTF-8"?>
    <LOGIC_EXPRESSION xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="file:/media/sf_Downloads/xml/Beta.xsd">
    <LOGIC_OPERATOR>not</LOGIC_OPERATOR>
    <LOGIC_VALUES>
      <LOGIC_VALUE>Variable1</LOGIC_VALUE>
        <LOGIC_VALUE>Variable2</LOGIC_VALUE>
    </LOGIC_VALUES>
    </LOGIC_EXPRESSION>

The XML schema should detect that it is a unary operator and you should receive an error.

Thaks a million