What are the different components of WSDL in Salesforce?

Hello sanjana

components of WSDL are:

Types: This defines the message data types, which are in the form of XML schema, used by the web services.
Message: This defines the data elements for each operation where messages could be the entire document or an argument that is to be mapped.
Port Type: There are multiple services present in WSDL. Port type defines the collection of operations that can be performed for binding.
Binding: Determines and defines the protocol and data format for each port type.
Operations: This defines the operations performed for a message to process the message.

Hi,

To add more -

Salesforce provides a WSDL (Web Service Description Language) files. They are called "Enterprise WSDL" and "Partner WSDL". A WSDL is an XML-document which contains a standardized description on how to communicate using a web service (the Salesforce API is exposed as a web service).

A WSDL is an XML document that describes a web service. It actually stands for Web Services Description Language. SOAP is an XML-based protocol that lets you exchange info over a particular protocol (can be HTTP or SMTP, for example) between applications

There components -

Data types − These are in the form of XML schemas.
Message − It is an abstract definition of the data, in the form of a message which can be either as a document or as arguments.
Operation − It is the abstract definition of the operation for a message.
Port type − It is set of operations mapped to one or more end-points, also defining the collection of operations for a binding.
Binding − It is the protocol and data formats for the operations that are defined for a particular port type.
Port − It is a combination of a binding and a network address.

Hope this helps.