XPath to check a XML Schema (XSD) for elements and types that don't have range / size restrictions

check_xsd_xpath.xpath

//xs:element[starts-with(@type, 'xs:')]/@name 
  | //xs:simpleType[
          xs:restriction[not(xs:length) and 
          not(xs:minInclusive and xs:maxInclusive) and 
          not(xs:maxLength) and not(xs:enumeration) and 
          not(starts-with(@base, 'xs:dateTime')) and
          not(xs:pattern[not(empty(@value))])]
    ]/@name

shipping_sample_schema.xsd

<?xml version="1.0" encoding="UTF-8"?>
<!-- Schema source: w3schools http://www.w3schools.com/schema/schema_example.asp -->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
	<xs:simpleType name="stringtype">
		<xs:restriction base="xs:string"/>
	</xs:simpleType>
	<xs:simpleType name="inttype">
		<xs:restriction base="xs:positiveInteger"/>
	</xs:simpleType>
	<xs:simpleType name="dectype">
		<xs:restriction base="xs:decimal"/>
	</xs:simpleType>
	<xs:simpleType name="orderidtype">
		<xs:restriction base="xs:string">
			<xs:pattern value="[0-9]{6}"/>
		</xs:restriction>
	</xs:simpleType>
	<xs:complexType name="shiptotype">
		<xs:sequence>
			<xs:element name="name" type="stringtype"/>
			<xs:element name="address" type="stringtype"/>
			<xs:element name="city" type="stringtype"/>
			<xs:element name="country" type="stringtype"/>
		</xs:sequence>
	</xs:complexType>
	<xs:complexType name="itemtype">
		<xs:sequence>
			<xs:element name="title" type="stringtype"/>
			<xs:element name="note" type="stringtype" minOccurs="0"/>
			<xs:element name="quantity" type="inttype"/>
			<xs:element name="price" type="dectype"/>
		</xs:sequence>
	</xs:complexType>
	<xs:complexType name="shipordertype">
		<xs:sequence>
			<xs:element name="orderperson" type="stringtype"/>
			<xs:element name="shipto" type="shiptotype"/>
			<xs:element name="item" maxOccurs="unbounded" type="itemtype"/>
		</xs:sequence>
		<xs:attribute name="orderid" type="orderidtype" use="required"/>
	</xs:complexType>
	<xs:element name="shiporder" type="shipordertype"/>
</xs:schema>

This gist is helpful if you have to deal with large XSDs from external sources. Running check_xsd_xpath.xpath against shipping_sample_schema.xsd (or any of your XSD) using a XML tool like Altova XMLSpy will generate a list of elements and types that don't have size/type restrictions.

E.g. Output for shipping_sample_schema.xsd

• name stringtype
• name inttype
• name dectype