According to XSD (wildfly-picketlink-federation_1_1.xsd) there has to be exactly one identity-provider and one service-providers element for every federation. However, federation can be also added empty (without these elements). It should be considered in XSD - value of this minOccurs attribute should be "0" instead of "1".
Kabir Khan <kabir.khan> updated the status of jira EAP6-182 to Resolved
Kabir Khan <kabir.khan> updated the status of jira EAP6-182 to Reopened
https://github.com/jbossas/jboss-eap/pull/1810
Ondrej Lukas <olukas> updated the status of jira EAP6-182 to Reopened
Verified in EAP 6.4.0.DR6.
Rostislav Svoboda <rsvoboda> updated the status of jira EAP6-182 to Resolved
Pedro Igor <pigor.craveiro> updated the status of jira WFLY-3978 to Resolved