xml/schema/std.xsd

<?xml version="1.0" encoding="UTF-8" ?>
<xs:schema targetNamespace="http://schema.xml.r00t2.io/std.xsd"
           xmlns="http://schema.xml.r00t2.io/std.xsd"
           xmlns:std="http://schema.xml.r00t2.io/std.xsd"
           xmlns:xs="http://www.w3.org/2001/XMLSchema"
           elementFormDefault="qualified"
           attributeFormDefault="qualified">

    <xs:simpleType name="t_UUID4">
        <xs:restriction base="xs:token">
            <xs:pattern value="[A-Fa-f0-9]{8}-[A-Fa-f0-9]{4}-[A-Fa-f0-9]{4}-[A-Fa-f0-9]{4}-[A-Fa-f0-9]{12}"/>
            <xs:whiteSpace value="collapse"/>
        </xs:restriction>
    </xs:simpleType>

    <xs:complexType name="t_cmdopts">
        <xs:simpleContent>
            <xs:extension base="xs:string">
                <xs:attribute name="name" use="required" type="xs:token"/>
            </xs:extension>
        </xs:simpleContent>
    </xs:complexType>

    <xs:simpleType name="t_epoch_or_iso">
        <!-- positiveInteger is used for UNIX Epoch. -->
        <xs:union memberTypes="xs:dateTime xs:positiveInteger"/>
    </xs:simpleType>

    <xs:simpleType name="t_nonempty">
        <xs:restriction base="xs:token">
            <xs:minLength value="1"/>
        </xs:restriction>
    </xs:simpleType>

    <xs:simpleType name="t_uri">
        <xs:restriction base="xs:anyURI">
            <xs:pattern value="(https?|ftps?|file)://.+"/>
            <xs:whiteSpace value="collapse"/>
        </xs:restriction>
    </xs:simpleType>

</xs:schema>