xsl:level 

The level attribute of xsl:number: 
one of single, multiple, or any.

Simple Type Information

Used By

Attribute xsl:number/@level

Source 

<xs:simpleType name="level">
  <xs:annotation>
    <xs:documentation>The level attribute of xsl:number: one of single, multiple, or any.</xs:documentation>
  </xs:annotation>
  <xs:restriction base="xs:NCName">
    <xs:enumeration value="single"/>
    <xs:enumeration value="multiple"/>
    <xs:enumeration value="any"/>
  </xs:restriction>
</xs:simpleType>