Generating XML schemas from instance documents
An XSD (XML Schema Definition) is required for running structure validation checks on a Web content file. IntelliJ IDEA can scan any XML file for the existing elements and attributes and generate a Schema for it.
Generate a Schema based on an XML document
With the desired XML document opened in the active editor tab, go to in the main menu. The Generate Schema From Instance Document dialog opens.
In the Instance Document Path field, specify the location of the file to be used as the basis for Schema generation. By default, the field shows the full path to the current file. Accept this suggestion or click Browse
and select the desired file in the dialog that opens.In the Result Schema File Name field, specify the name of the output file to place the generated Schema in.
Specify the location of the generated Schema. By default, the generated Schema file will be placed in the same directory as the source XML instance document. To specify another location, click Browse
and select the desired path in the dialog that opens.From the Design Type list, select the way to declare elements and complex types.
From the Detect Simple Content Type list, select the type to use for leaf text.
In the Detect Enumerations Limit field, type the number of occurrences to cause appearance of the Schema enumeration.