Grouping xml messages and Message ordering

[Developer D]

1. I have a scenario where a single xml file should be split into multiple xml 
files(due to restriction in msg transfer size) and sent to end point(external 
system). how do i achieve it camel? any samples out there?
2. How can i achieve sequence or preserve order while sending message to 
endpoint. am not using queue and multiple messages will be going through camel 
to endpoint.