For the purpose of testing attachment syntax

Getting a file from this page?

A file: !ed.jpeg!

A file with an alias: !ed.jpeg!

How about a non-image file: [^ed.txt]
with alias: [alias|^ed.txt]

Another page that will reference this attachment: [AttachmentReferringPage]

Inlining? could get from jspwiki.properties, or just guess

!Wiki.png!
!hummingbird.jpg!