According to the discussion in https://docs.google.com/document/d/1UMNoY9_L4_-7qmxr8mKI19WwMuLdkLaqZbKYGjJ-wJg , the manifest should contain logical-version field with the name of the update, e.g.

 ---
schemaVersion: "1.1.0"
name: "EAP 8.1 Beta"
logical-version: "EAP 8.1 Beta"
id: "org.jboss.eap.channels:eap-8.1"
description: "This manifest provides the latest upgrades to provision EAP 8.1"

Note: The document does not define the exact naming for a Beta version - "EAP 8.1 Beta" should be confirmed.

cc jbliznak@redhat.com