null or complex type element

[MD]

I am trying to define the schema for xml document.

One of elements can have null / complex type x/ y

<coordinate>
<x>5</x>
<y>1</y>
</coordinate>

or

<coordinate>
</coordinate>


I tried with union but without the lack since it only works with simpletype

any help is appreciated.

MD

 

[Joe Kesselman]

One suggestion: Coordinate's content is a sequence of x and y; the
sequence has minoccurs of 0 (may be absent) and maxoccurs of 1 (may not
be repeated).

 

[M D]

I also need to specify that x,y is a pair( if one exists the other has to be
there, too)

 

[Joe Kesselman]

I also need to specify that x,y is a pair( if one exists the other has to be
there, too)

Doesn't wrapping them in sequence do that by default?

 

[MD]

I gotta your point. Thank you.

MD

Doesn't wrapping them in sequence do that by default?