Contradiction in servlet spec

[Russell Tao]

I found there was a contradiction in servlet spec(pdf),
at p313: <!ELEMENT security-role-ref (description?, role-name, role-link)>
at p336: <!ELEMENT security-role-ref (description?, role-name, role-link?)>

Wondering whether role-link is required or not in security-role-ref?

[Narendra Dhande]

Hi,

at p336: <!ELEMENT security-role-ref (description?, role-name, role-link?)>

The <role-link> is optional.

Thanks