XML : How can I use several xml filter for one xml message

I have to parse an XML document (received as a rabbitmq message) but I want to get some more info according some filters. Here the xml part of my logstash

  if ([message] =~ /^</) {    xml {      ...      xpath => [        "/APIOS_MOM_EVENT/IDENT/NO_EMIARTE/text()", "NO_EMIARTE",        "name(/APIOS_MOM_EVENT/DATA/APIOS_EXPORT/*[not(self::METADATA)])","MESSAGE_TYPE",        "name(/APIOS_MOM_EVENT/DATA/*)","RECOMMENDATIONS",        "/APIOS_MOM_EVENT/DATA/APIOS_EXPORT/METADATA/CODE_OFFRE_WEB/text()","OFFRE_WEB"      ]      target => "xml"    }    alter {      condrewrite => [        "MESSAGE_TYPE","","EDITO"               ]      condrewriteother => [        "RECOMMENDATIONS","RECOMMENDATIONS","MESSAGE_TYPE","RECOMMENDATIONS"      ]      condrewriteother => [        "RECOMMENDATIONS","SCHEDULE","MESSAGE_TYPE","SCHEDULE"      ]      remove_field => [ "RECOMMENDATIONS" ]    }    if [MESSAGE_TYPE]=="SCHEDULE" {              xml{        source => "message"        store_xml => false        xpath => [                      "/APIOS_MOM_EVENT/DATA/SCHEDULE/DAY/@DATE","DAY"        ]        target => "xml"                }    }  }    

So here if I have a SCHEDULE MESSAGE_TYPE I would like to add a filter to get the DAY but it seems quite complex to do so. I have the feeling that MESSAGE_TYPE is not available in my if statement

It's all good until if [MESSAGE_TYPE]=="SCHEDULE" {