How to refer to a classpath XSD in xsi:schemaLocation?

For example, I want instead of referring to an online XSD like this:

<persistence xmlns="…" xmlns:xsi="…"
    xsi:schemaLocation="http://ift.tt/1cKbVbQ
    http://ift.tt/1BPK8Cn">  <!-- online -->

To refer to a classpath XSD like this:

<persistence xmlns="…" xmlns:xsi="…"
    xsi:schemaLocation="http://ift.tt/1cKbVbQ
    org/hibernate/jpa/persistence_2_1.xsd">   <!-- classpath -->