XML/XML Schema/minInclusive

xs:minInclusive defines a minimum value that can be reached:

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"
              >

 19
</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="positive"/>
  <xsd:simpleType name="positive">
    <xsd:restriction base="xsd:double">
      <xsd:minInclusive value="0" />
    </xsd:restriction>
  </xsd:simpleType>
</xsd:schema>