<?xml version="1.0" encoding="utf-8"?>
<xs:schema targetNamespace="http://schemas.flvmeta.org/report/1.0/"
    elementFormDefault="qualified"
    xmlns="http://schemas.flvmeta.org/report/1.0/"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
>
  <xs:element name="report">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="metadata" type="tMetadata"/>
        <xs:element name="messages" type="tMessages"/>
      </xs:sequence>
    </xs:complexType>
  </xs:element>

  <xs:complexType name="tMetadata">
    <xs:sequence>
      <xs:element name="filename" minOccurs="0" maxOccurs="1" type="xs:string"/>
      <xs:element name="creation-date" type="xs:dateTime"/>
      <xs:element name="generator" type="xs:string"/>
    </xs:sequence>
  </xs:complexType>

  <xs:complexType name="tMessages">
    <xs:sequence>
      <xs:element name="message" minOccurs="0" maxOccurs="unbounded" type="tMessage"/>
    </xs:sequence>
  </xs:complexType>

  <xs:complexType name="tMessage">
    <xs:simpleContent>
      <xs:extension base="xs:string">
        <xs:attribute name="level" use="required" type="tMessageLevel"/>
        <xs:attribute name="offset" use="optional" type="xs:nonNegativeInteger"/>
        <xs:attribute name="code" use="required" type="tMessageCode"/>
      </xs:extension>
    </xs:simpleContent>
  </xs:complexType>

  <xs:simpleType name="tMessageLevel">
    <xs:restriction base="xs:string">
      <xs:enumeration value="info"/>
      <xs:enumeration value="warning"/>
      <xs:enumeration value="error"/>
      <xs:enumeration value="fatal"/>
    </xs:restriction>
  </xs:simpleType>

  <xs:simpleType name="tMessageCode">
    <xs:restriction base="xs:token">
      <xs:pattern value="[IWEF][0-9]{5}"/>
    </xs:restriction>
  </xs:simpleType>
</xs:schema>