ambari-server/src/main/resources/configuration-schema.xsd

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
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 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
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 * limitations under the License.
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-->
<xs:schema version="1.0" xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="configuration">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="property" type="property" minOccurs="0" maxOccurs="unbounded"/>
      </xs:sequence>
      <xs:attribute name="supports_final" type="xs:boolean" use="optional"/>
      <xs:attribute name="supports_deletable" type="xs:boolean" use="optional"/>
      <xs:attribute name="supports_adding_forbidden" type="xs:boolean" use="optional"/>
      <xs:attribute name="supports_do_not_extend" type="xs:boolean" use="optional"/>
    </xs:complexType>
  </xs:element>

  <xs:complexType name="property">
    <xs:all>
      <xs:element name="name" type="xs:string" minOccurs="1"/>
      <xs:element name="value" type="xs:string" minOccurs="0"/>
      <xs:element name="description" type="xs:string" minOccurs="0"/>
      <xs:element name="display-name" type="xs:string" minOccurs="0"/>
      <xs:element name="filename" type="xs:string" minOccurs="0"/>
      <xs:element name="deleted" type="xs:boolean" minOccurs="0"/>
      <xs:element name="final" type="xs:boolean" minOccurs="0"/>
      <xs:element name="on-ambari-upgrade" type="propertyUpgradeBehavior" minOccurs="1"/>
      <xs:element name="supported-refresh-commands" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="refresh-command" type="refreshCommands" minOccurs="1" maxOccurs="unbounded"/>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="on-stack-upgrade" type="propertyStackUpgradeBehavior" minOccurs="0"/>
      <xs:element name="property-type" minOccurs="0">
        <xs:simpleType>
          <xs:list itemType="propertyType"/>
        </xs:simpleType>
      </xs:element>
      <xs:element name="value-attributes" type="valueAttributesInfo" minOccurs="0"/>
      <xs:element name="depends-on" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="property" type="propertyDependencyInfo" minOccurs="1" maxOccurs="unbounded"/>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="property_depended_by" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="dependedByProperties" type="propertyDependencyInfo" nillable="true" minOccurs="0"
                        maxOccurs="unbounded"/>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="used-by" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="property" type="propertyDependencyInfo" minOccurs="1" maxOccurs="unbounded"/>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
    </xs:all>
    <xs:attribute name="require-input" type="xs:boolean" use="optional"/>
  </xs:complexType>

  <xs:complexType name="propertyUpgradeBehavior">
    <xs:attribute name="add" type="xs:boolean" use="optional" default="true"/>
    <xs:attribute name="delete" type="xs:boolean" use="optional"/>
    <xs:attribute name="update" type="xs:boolean" use="optional"/>
  </xs:complexType>

  <xs:complexType name="propertyStackUpgradeBehavior">
    <xs:attribute name="merge" type="xs:boolean" use="optional" default="true"/>
  </xs:complexType>

  <xs:complexType name="refreshCommands">
    <xs:attribute name="componentName" type="xs:string" use="required"/>
    <xs:attribute name="command" type="xs:string" use="optional"/>
  </xs:complexType>

  <xs:complexType name="valueAttributesInfo">
    <xs:all>
      <xs:element name="type" type="xs:string" minOccurs="0"/>
      <xs:element name="maximum" type="xs:string" minOccurs="0"/>
      <xs:element name="minimum" type="xs:string" minOccurs="0"/>
      <xs:element name="unit" type="xs:string" minOccurs="0"/>
      <xs:element name="delete" type="xs:string" minOccurs="0"/>
      <xs:element name="visible" type="xs:boolean" minOccurs="0"/>
      <xs:element name="overridable" type="xs:boolean" minOccurs="0"/>
      <xs:element name="empty-value-valid" type="xs:boolean" minOccurs="0"/>
      <xs:element name="ui-only-property" type="xs:boolean" minOccurs="0"/>
      <xs:element name="read-only" type="xs:boolean" minOccurs="0"/>
      <xs:element name="editable-only-at-install" type="xs:boolean" minOccurs="0"/>
      <xs:element name="show-property-name" type="xs:boolean" minOccurs="0"/>
      <xs:element name="increment-step" type="xs:string" minOccurs="0"/>
      <xs:element name="keystore" type="xs:boolean" minOccurs="0"/>
      <xs:element name="entries" minOccurs="0">
        <xs:complexType>
          <xs:sequence>
            <xs:element name="entry" type="valueEntryInfo" minOccurs="0" maxOccurs="unbounded"/>
          </xs:sequence>
        </xs:complexType>
      </xs:element>
      <xs:element name="hidden" type="xs:string" minOccurs="0"/>
      <xs:element name="entries_editable" type="xs:boolean" minOccurs="0"/>
      <xs:element name="selection-cardinality" type="xs:string" minOccurs="0"/>
      <xs:element name="property-file-name" type="xs:string" minOccurs="0"/>
      <xs:element name="property-file-type" type="xs:string" minOccurs="0"/>
    <xs:element name="user-groups" minOccurs="0">
      <xs:complexType>
        <xs:sequence>
          <xs:element name="property" type="userGroupInfo" minOccurs="1" maxOccurs="unbounded"/>
        </xs:sequence>
      </xs:complexType>
    </xs:element>
    </xs:all>
  </xs:complexType>


  <xs:complexType name="valueEntryInfo">
    <xs:all>
      <xs:element name="value" type="xs:string" minOccurs="0"/>
      <xs:element name="label" type="xs:string" minOccurs="0"/>
      <xs:element name="description" type="xs:string" minOccurs="0"/>
    </xs:all>
  </xs:complexType>

  <xs:complexType name="userGroupInfo">
    <xs:sequence>
      <xs:choice minOccurs="0" maxOccurs="unbounded">
        <xs:element name="name" type="xs:string" minOccurs="0"/>
        <xs:element name="type" type="xs:string" minOccurs="0"/>
      </xs:choice>
    </xs:sequence>
  </xs:complexType>

  <xs:complexType name="propertyDependencyInfo">
    <xs:sequence>
      <xs:choice minOccurs="0" maxOccurs="unbounded">
        <xs:element name="name" type="xs:string" minOccurs="0"/>
        <xs:element name="type" type="xs:string" minOccurs="0"/>
      </xs:choice>
    </xs:sequence>
  </xs:complexType>

  <xs:simpleType name="propertyType">
    <xs:restriction base="xs:string">
      <xs:enumeration value="PASSWORD"/>
      <xs:enumeration value="USER"/>
      <xs:enumeration value="GROUP"/>
      <xs:enumeration value="TEXT"/>
      <xs:enumeration value="ADDITIONAL_USER_PROPERTY"/>
      <xs:enumeration value="NOT_MANAGED_HDFS_PATH"/>
      <xs:enumeration value="VALUE_FROM_PROPERTY_FILE"/>
      <xs:enumeration value="KERBEROS_PRINCIPAL"/>
    </xs:restriction>
  </xs:simpleType>
</xs:schema>