I am using Liberty application server, which have server.xml as a configuration file for server.
Is there a XSD schema for server.xml?
Any of schemes for open-liberty or websphere-liberty - would be good for me.
You can generate one using the 'serverSchemaGen' script from the Liberty 'bin' directory.
./serverSchemaGen server1
The server will need to be started and the 'localConnector-1.0' feature needs to be enabled. It will generate a schema that is specific to that server (ie, it will only generate content for features that are enabled on that server.)
Alternatively, you can run:
java -jar wlp/bin/tools/ws-schemagen.jar {output file}
This will generate a complete schema using all available features.