使用xsd.exe生成c＃文件，获取错误和警告

这是我正在运行的命令：

xsd.exe -c -l:c# D:DocumentsDEVSARPilotDocsschemas6-141r26-141r2.xsd 

这些是我得到的错误：

 Microsoft (R) Xml Schemas/DataTypes support utility [Microsoft (R) .NET Framework, Version 2.0.50727.3038] Copyright (C) Microsoft Corporation. All rights reserved. Schema validation warning: Undefined complexType 'https://www.opengis.net/sps/0:ParameterDescriptorType' is used as a base for comp lex type extension. Line 617, position 2. Schema validation warning: Undefined complexType 'https://www.opengis.net/ows:GetCapabilitiesType' is used as a base for complex ty pe extension. Line 23, position 2. Schema validation warning: Undefined complexType 'https://www.opengis.net/ows:CapabilitiesBaseType' is used as a base for complex t ype extension. Line 35, position 2. Schema validation warning: The 'https://www.opengis.net/gml:Point' element is not declared. Line 869, position 2. Schema validation warning: The 'https://www.opengis.net/gml:Polygon' element is not declared. Line 870, position 2. Schema validation warning: The 'https://www.opengis.net/gml:Rectangle' element is not declared. Line 871, position 2. Schema validation warning: The 'https://www.opengis.net/sps/0:Parameter' element is not declared. Line 381, position 2. Schema validation warning: The 'https://www.opengis.net/sps/0:ID' element is not declared. Line 451, position 2. Warning: Schema could not be validated. Class generation may fail or may produce incorrect results. Error: Error generating classes for schema 'D:DocumentsDEVSARPilotDocsschemas6-141r26-141r2'. - The datatype 'https://www.opengis.net/ows:GetCapabilitiesType' is missing. If you would like more help, please type "xsd /?". C:Program Files (x86)Microsoft SDKsWindowsv7.0ABin> 

XSD文件是从以下文档的附录A中复制/粘贴的： http ： //services.eoportal.org/portal/documents/06-141r2_Ordering_Services_for_Earth_Observation_Products_0.9.2.pdf