Question

Is there any way to write a markup like following in Relax NG compact (It seems that it have not a counterpart in Relax NG XML)

bar = foo =  element title {text}

In future somebody may want assign different value to bar and foo, but until that time he wants to use above code.

Answer 1

Use

bar = foo
foo = element title {text}

See also the entry Named Patterns in the RELAX NG Compact Syntax Tutorial, which discusses this exact syntax:

start = e
e = element element { text }