XML/XML Schema/time

enumerations include a time zone

File: Data.xml
<?xml version="1.0"?>
<data xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
              xsi:schemaLocation="http://www.wbex.ru Schema.xsd"
              xmlns="http://www.wbex.ru"
              >07:00:00-07:00</data>
              
File: Schema.xsd
<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
  targetNamespace="http://www.wbex.ru" xmlns="http://www.wbex.ru"
  elementFormDefault="qualified">
    <xsd:element name="data" type="wakeUpTime"/>
  <xsd:simpleType name="wakeUpTime">
    <xsd:restriction base="xsd:time">
      <xsd:enumeration value="07:00:00-07:00" />
      <xsd:enumeration value="07:15:00-07:00" />
    </xsd:restriction>
  </xsd:simpleType>
</xsd:schema>

xs:minExclusive defines a minimum value that can be reached based on xs:time

<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
  targetNamespace="http://www.wbex.ru" xmlns="http://www.wbex.ru"
  elementFormDefault="qualified">
    <xsd:element name="data" type="afterTeaTimeInParisInSummer"/>

  <xsd:simpleType name="afterTeaTimeInParisInSummer">
    <xsd:restriction base="xsd:time">
      <xsd:minExclusive value="17:00:00+02:00" />
    </xsd:restriction>
  </xsd:simpleType>
</xsd:schema>