| <!-- |
| Copyright 2016 The Chromium Authors. All rights reserved. |
| Use of this source code is governed by a BSD-style license that can be |
| found in the LICENSE file. |
| --> |
| <!-- |
| |
| Welcome to a document type declaration (DTD). |
| This is a document that makes sure XML files are correctly formed. |
| |
| Below, |request| is implied to be the root element of the XML document, whose |
| children are |os| and |app|. |
| --> |
| <!ELEMENT request (os, app)> |
| <!-- |
| |
| Below, this indicates that |protocol| is a required attribute of the |
| |request| element; the presence of `NMTOKEN` indicates that this attribute |
| must have a value associated with it that does not contain whitespace. `CDATA` |
| would be the more commonly used keyword for content with whitespace. |
| --> |
| <!ATTLIST request protocol NMTOKEN #REQUIRED> |
| <!-- |
| |
| The |os| element should not have any children and cannot have any content |
| within the tag. (<os/> and <os></os> are allowed, but <os>stuff here!</os> is |
| not a valid element.) |
| --> |
| <!ELEMENT os EMPTY> |
| <!-- |
| |
| This |platform| attribute is a required attribute of |os|, and its value must |
| be "mac". |
| --> |
| <!ATTLIST os platform (mac) #REQUIRED> |
| <!-- |
| |
| The |version|, |arch|, and |sp| attributes are optional attributes of |os|. If |
| a request's XML body has the |sp|, it may not need the version or arch; if the |
| |sp| is not included but |version| and |arch| are specified, the XML body is |
| still valid. Unfortunately there is relatively less logic available for |
| attributes, so I currently cannot reject the XML document if there is only |
| either |arch| or |version|. |
| --> |
| <!ATTLIST os version NMTOKEN #IMPLIED> |
| <!ATTLIST os arch NMTOKEN #IMPLIED> |
| <!ATTLIST os sp NMTOKEN #IMPLIED> |
| <!-- |
| |
| |app| has only one child, |updatecheck|. |
| --> |
| <!ELEMENT app (updatecheck)> |
| <!-- |
| |
| The |appid| attribute of the |app| element must have "com.google.Chrome" as |
| its value. |
| --> |
| <!ATTLIST app appid (com.google.Chrome) #REQUIRED> |
| <!-- |
| |
| The following two attributes are required; their values must not contain |
| whitespace. |
| --> |
| <!ATTLIST app version NMTOKEN #REQUIRED> |
| <!ATTLIST app lang NMTOKEN #REQUIRED> |
| <!-- |
| |
| |updatecheck| must be an empty element. |
| --> |
| <!ELEMENT updatecheck EMPTY> |
