How to use file relative path in xml

I have xml files in certain folders in my project, i want to read them by using folder level(../) hierarchy which is relative path. The below is my folder structure:

BasePath:

E:SDC-Build\SRDM2.3.0.6904.10\SRDM\Svr

a)tomcat

b)Idp -- >Idpserver-->idp -->WEB-INF->service.xml

c)Idp -- >Idpserver-->conf->attribute-resolver.xml

The above a, b, c are under above given base path.

I have the service.xml like below

but the above given path is not working, could any body please correct me if i gave the wrong path.