Read hierarchy, type and occurence out of XSD-File

i want to read the hierarchies, types and occurences out of a XSD-File. Until now i have only succeded importing the file into an XmlSchemaSet Object, from which i still cannot read the string/int/bool types, neither the max/min occurences or hierarchies.

Example:

<?xml version="1.0" encoding="utf-8"?>
<xs:schema 
  attributeFormDefault="unqualified" 
  elementFormDefault="qualified" 
  xmlns:xs="http://ift.tt/tphNwY"
>

  <xs:simpleType name="ActionType">
    <xs:restriction base="xs:string">
      <xs:enumeration value="GET"/>
      <xs:enumeration value="POST"/>
    </xs:restriction>
  </xs:simpleType>

  <xs:element name="Data">
    <xs:complexType>
      <xs:all>
        <xs:element name="Action" type="ActionType" minOccurs="1" maxOccurs="1" />
        <xs:element name="Target" type="xs:string" minOccurs="1" maxOccurs="1" />
        <xs:element name="Parameters" minOccurs="1" maxOccurs="1">
          <xs:complexType>
            <xs:sequence>
          <xs:element name="include_entities" maxOccurs="0" />
          <xs:element name="include_user_entities" maxOccurs="0" />
          <xs:any processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
        </xs:sequence>
      </xs:complexType>
    </xs:element>
  </xs:all>
</xs:complexType>