structure questions

An XML Schema defines the structure and rules for an XML document. It specifies what elements and attributes are allowed, their data types, and how they are related to each other. XML Schemas ensure that the XML document is valid and follows a predefined structure, which helps in data consistency across systems. 

 <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="note" type="xs:string" />
</xs:schema>

A structure in C is a user-defined data type that allows grouping of variables of different data types under a single name. It is useful when handling complex data types like student records or employee data. Structures can contain members like int, char arrays, and other data types. 
 
struct Person { char name[20]; int age; };
struct Person p1 = { "John", 25 };