blocks|key|1160711|text|XSD用于验证文档，并包含有关XML的元数据，而WSDL用于描述WSDL服务的位置和操作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1160712|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

XSD is to validate the document, and contains metadata about the XML whereas WSDL is to describe the webservice location and operations.

blocks|key|1160752|text|XSD定义了一个模式，该模式定义了如何构造XML文档。您可以使用它来检查给定的XML文档是否有效，并遵循您在模式中列出的规则。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1160753|WSDL是描述web服务的XML文档。它显示了哪些操作是可用的，以及应该如何构造数据以发送到这些操作。|1160754|WSDL文档有一个关联的XSD，该XSD显示放在WSDL文档中的有效内容。|1160755|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

XSD defines a schema which is a definition of how an XML document can be structured. You can use it to check that a given XML document is valid and follows the rules you've laid out in the schema.
WSDL is a XML document that describes a web service. It shows which operations are available and how data should be structured to send to those operations.
WSDL documents have an associated XSD that show what is valid to put in a WSDL document.

blocks|key|1376081|text|XSD+(XML模式定义)定义了XML文档中的元素。它可用于验证xml文档中的元素是否符合要放置内容的描述。而wsdl是描述web服务的特定类型的XML文档。WSDL本身遵循XSD。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1376082|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

XSD (XML schema definition) defines the element in an XML document. It can be used to verify if the elements in the xml document adheres to the description in which the content is to be placed. 
While wsdl is specific type of XML document which describes the web service. WSDL itself adheres to a XSD.

blocks|key|1376232|text|WSDL+-它包含操作，例如webservice的方法这些方法可以接受简单的数据类型，如整型，浮点型等和复杂的数据类型，如对象，向量，数组等，因此使用将其映射到provides.and数据类型xsd。并且基于xsd，想要从不同平台访问webservice的用户可以适当地提供数据。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1376233|参考:ayazroomy-java.blogpot.com阅读webservice的基础知识。|1376234|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

WSDL - It contains the Operation such as Methods which a webservice provides.and these method can accept simple data types such as int,float etc and complex data types such as objects ,vectors, arrays etc. so mapping this to an xml datatype xsd are used. and based upon the xsd an user who wants to acccess webservice from different platform can provide the data appropriately.

Refer : ayazroomy-java.blogspot.com to read about basics of webservice.

blocks|key|1161283|text|XSD+:+XML模式定义。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1161284|XML+:+eXtensible标记语言。|1161285|WSDL+:+Web服务定义语言。|1161286|我不会用技术术语来回答。我的目标读者是初学者。|1161287|在使用两种不同技术开发的两个不同应用程序之间进行通信并不容易。例如，芝加哥的一家公司可能使用Java开发web应用程序，而纽约的另一家公司可能用C#开发应用程序，当这两家公司决定共享信息时，XML就应运而生了。它有助于在使用不同技术开发的两个不同应用程序之间存储和传输数据。注意:不限于编程语言，请研究两个不同应用程序之间的信息传输。|1161288|XSD是一种模式定义。我的意思是，它告诉用户在这样的模式中开发他们的XML。请看下面的图片，请仔细观察“启动时加载”元素及其类型，它是整数。在XSD图像中，您可以看到它是“启动时加载”的整数值，因此，当用户创建他/她的XML时，他们将一个int值传递给该特定元素。需要提醒的是，XSD是一种模式和样式，而XML是一种用于与另一个应用程序或系统进行通信的表单。必须看到XSD并以这种方式创建XML，否则它将无法与使用不同技术开发的另一个应用程序或系统进行通信。芝加哥的一家公司为德克萨斯州的一家公司提供了一个XSD模板，用于以给定的XSD格式编写或生成其XML。如果德克萨斯州的公司未能遵守XSD中提到的那些规则或模式，那么就不可能期望来自芝加哥的公司的正确信息。在上面提到的故事之后，有太多的事情要做，一个业余或新手在为我上面所说的一些事情编码时必须知道。如果您真的想知道以后会发生什么，那么最好是与实际开发web服务的高级软件工程师坐在一起。接下来是WSDL，请跟随图像并尝试找出WSDL将适合的位置。|1161289|***************========Below是部分XML图像==========***************。|1161290|📷|atomic|offset|length|1161291|​|1161292|***************========Below是部分XSD镜像==========***************|1161293|1161294|1161295|1161296|***************========Below是部分WSDL镜像=======*************。|1161297|1161298|1161299|1161300|我必须为一个名为Book的web服务创建一个示例WSDL。请注意，它是一种XSD，但您必须将其称为WSDL+(Web服务定义语言)，因为它是特定于Web服务的。上面的WSDL+(或者换句话说，XSD)是为一个名为Book.java的类创建的，并且它已经创建了一个SOAP服务。SOAP+web服务是如何创建它的是另一个主题。您必须编写一个Java类，并且在执行它作为web服务创建之前，用户必须确保Tomcat已经安装，并且Axis2用于托管web服务的位置已经就位。|1161301|作为服务者(允许其他人(客户)访问其系统中的信息或数据的人)，实际上是通过Web服务授予客户端(需要使用服务者信息或数据的人)对数据的完全访问权限，因为地球上没有一家公司愿意将他们的数据库公开给外人。像我的公司一样，决定通过Web服务提供一些关于产品的信息，因此我们必须创建XSD模板，并将其传递给想要与我们合作的少数客户。他们必须编写一些代码来充分利用给定的XSD，并进行Web服务调用以从服务器获取数据，并将返回的数据转换为他们合适的需求，然后在他们的网站上显示或发布有关产品的数据或信息。一个简单的例子就是机票预订。航空公司将允许第三方在其网站上使用航班数据进行机票销售。但再说一次，还有更多的东西，它只是不让第三方机票代理销售机票，将有同步和安全到位。如果没有同步，那么有100+%25的机会超过1个客户可能购买相同的机票从不同来源。|1161302|我希望专家们能对我的回答做出贡献。对于新手或新手来说，很难理解XML、XSD，然后在Web服务上工作。|1161303|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/995ae4432e07b2b05fd7cb5d21cdf352.png|imageAlt|1|https://ask.qcloudimg.com/http-save/yehe-900000/0500a6a92ff52b36c85f743d71d8f0d6.png|2|https://ask.qcloudimg.com/http-save/yehe-900000/865dfd0af7be36cd9d57cd1c9b99e25a.png^0|0|0|0|0|0|0|0|0|1|0|0|0|0|0|0|1|1|0|0|0|0|0|1|2|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1O|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|1P|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|1R|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|1S|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|1T|8|@]|9|@]|A|$]]|$1|N|3|O|5|P|7|1U|8|@]|9|@$Q|1V|R|1W|1|1X]]|A|$]]|$1|S|3|T|5|6|7|1Y|8|@]|9|@]|A|$]]|$1|U|3|V|5|6|7|1Z|8|@]|9|@]|A|$]]|$1|W|3|T|5|6|7|20|8|@]|9|@]|A|$]]|$1|X|3|O|5|P|7|21|8|@]|9|@$Q|22|R|23|1|24]]|A|$]]|$1|Y|3|T|5|6|7|25|8|@]|9|@]|A|$]]|$1|Z|3|10|5|6|7|26|8|@]|9|@]|A|$]]|$1|11|3|T|5|6|7|27|8|@]|9|@]|A|$]]|$1|12|3|O|5|P|7|28|8|@]|9|@$Q|29|R|2A|1|2B]]|A|$]]|$1|13|3|T|5|6|7|2C|8|@]|9|@]|A|$]]|$1|14|3|15|5|6|7|2D|8|@]|9|@]|A|$]]|$1|16|3|17|5|6|7|2E|8|@]|9|@]|A|$]]|$1|18|3|19|5|6|7|2F|8|@]|9|@]|A|$]]|$1|1A|3|-4|5|6|7|2G|8|@]|9|@]|A|$]]]|1B|$1C|$5|1D|1E|1F|A|$1G|1H|1I|-4]]|1J|$5|1D|1E|1F|A|$1G|1K|1I|-4]]|1L|$5|1D|1E|1F|A|$1G|1M|1I|-4]]]]

XSD : XML Schema Definition. 

XML : eXtensible Markup Language.

WSDL : Web Service Definition Language. 

I am not going to answer in technical terms. I am aiming this explanation at beginners.

It is not easy to communicate between two different applications that are developed using two different technologies. For example, a company in Chicago might develop a web application using Java and another company in New York might develop an application in C# and when these two companies decided to share information then XML comes into picture. It helps to store and transport data between two different applications that are developed using different technologies. Note: It is not limited to a programming language, please do research on the information transportation between two different apps. 

XSD is a schema definition. By that what I mean is, it is telling users to develop their XML in such a schema. Please see below images, and please watch closely with "load-on-startup" element and its type which is integer. In the XSD image you can see it is meant to be integer value for the "load-on-startup" and hence when user created his/her XML they passed an int value to that particular element. As a reminder, XSD is a schema and style whereas XML is a form to communicate with another application or system. One has to see XSD and create XML in such a way or else it won't communicate with another application or system which has been developed with a different technology. A company in Chicago provides a XSD template for a company in Texas to write or generate their XML in the given XSD format. If the company in Texas failed to adhere with those rules or schema mentioned in XSD then it is impossible to expect correct information from the company in Chicago. There is so much to do after the above said story, which an amateur or newbie have to know while coding for some thing like I said above. If you really want to know what happens later then it is better to sit with senior software engineers who actually developed web services. Next comes WSDL, please follow the images and try to figure out where the WSDL will fit in. 

***************========Below is partial XML image ==========***************
<img src="https://i.stack.imgur.com/KvF2N.png" alt="XML image partial">

***************========Below is partial XSD image ==========***************

<img src="https://i.stack.imgur.com/xojA1.png" alt="XSD image partial">

***************========Below is the partial WSDL image =======*************

<img src="https://i.stack.imgur.com/PqUtm.png" alt="WSDL image partial">

I had to create a sample WSDL for a web service called Book. Note, it is an XSD but you have to call it WSDL (Web Service Definition Language) because it is very specific for Web Services. The above WSDL (or in other words XSD) is created for a class called Book.java and it has created a SOAP service. How the SOAP web service created it is a different topic. One has to write a Java class and before executing it create as a web service the user has to make sure Axis2 API is installed and Tomcat to host web service is in place. 

As a servicer (the one who allows others (clients) to access information or data from their systems ) actually gives the client (the one who needs to use servicer information or data) complete access to data through a Web Service, because no company on the earth willing to expose their Database for outsiders. Like my company, decided to give some information about products via Web Services, hence we had to create XSD template and pass-on to few of our clients who wants to work with us. They have to write some code to make complete use of the given XSD and make Web Service calls to fetch data from servicer and convert data returned into their suitable requirement and then display or publish data or information about the product on their website. A simple example would be FLIGHT Ticket booking. An airline will let third parties to use flight data on their site for ticket sales. But again there is much more to it, it is just not letting third party flight ticket agent to sell tickets, there will be synchronize and security in place. If there is no sync then there is 100 % chances more than 1 customer might buy same flight ticket from various sources. 

I am hoping experts will contribute to my answer. It is really hard for newbie or novice to understand XML, XSD and then to work on Web Services.

blocks|key|1161349|text|如果有人在寻找类比，这个答案可能会有所帮助。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1161350|WSDL类似于mysql中的“SHOW+TABLE+STATUS”命令。它定义了应该是XML一部分的所有元素(请求类型、响应类型、命中请求的URL格式等)。我的定义是:+1)请求或响应的名称2)什么应该被视为输入，什么应该被视为输出。|1161351|XSD类似于mysql中的DESCRIBE命令。它告诉所有的变量和它们的类型，一个请求和响应包含什么。|1161352|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

If someone is looking for analogy , this answer might be helpful.

WSDL is like 'SHOW TABLE STATUS' command in mysql. It defines all the elements(request type, response type, format of URL to hit request,etc.,) which should be part of XML. By definition I mean:
1) Names of request or response
2) What should be treated as input , what should be treated as output.

XSD is like DESCRIBE command in mysql. It tells what all variables and their types, a request and response contains.

blocks|key|1376570|text|XSD是WSDL文件的架构。XSD包含WSDL的数据类型。在XSD中声明的元素可在WSDL文件中使用。我们可以对照XSD检查WSDL，以检查web服务WSDL是否有效。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1376571|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

XSD is schema for WSDL file. XSD contain datatypes for WSDL. Element declared in XSD is valid to use in WSDL file.
We can Check WSDL against XSD to check out web service WSDL is valid or not.

What is the difference between an <code>XML Schema</code> and <code>WSDL</code>?

The difference I noticed is that <code>WSDL</code> contains <code>XSD</code> and in <code>WSDL</code> we can declare operations, but not in <code>XSD</code>. Is that correct?

What is the difference between XSD and WSDL?

数据转换

软件工程

数据库

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Java

XML Schema和WSDL之间有什么区别我注意到的不同之处在于WSDL包含XSD，并且在WSDL中我们可以声明操作，但在XSD中不能。对吗？

问XSD和WSDL之间的区别是什么？
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