FW: XML Schema help

> Hi,
> 
>      I have the following requirement to be incorporated in one of my
> schemas.
>      Requirement:
>      1. To have to elements: elem1 and elem2
>      2. Either of these two elements could be present or both could be
> present at the same time in the instance document.
>          I.e: (elem1 | elem2 | (elem1 & elem2))
> 
>      How do I specify this in the schema???
>     
> TIA,
> 
> 
> Avinash Subramanya
> Developer
> Aztec Software And Technology Services Limited
> 23, 3rd 'A' Cross, 18th Main, 6th Block, Koramangala
> Bangalore - 560095, India
> Phone: 5522892/93 Ext: 205
> Fax: 91-80-5521987
> Mobile: 98441 29329
>