XML Schema Components

A schema diagram contains a series of interconnected components. To quickly identify the relation between two connected components, the connection is represented as:

• A thick line to identify a connection with a required component (in the following image, family is a required element).

  Example: Required Component

  

• A thin line to identify a connection with an optional component (in the following image, email is an optional element).

  Example: Optional Component

  

The following topics explain in detail all available components and their symbols as they appear in an XML schema diagram.