Optionally <link to="https://en.wikipedia.org/wiki/Namespace">qualified</link> symbolic expressions
allow OSN texts to mix data from different domains preserving their own semantics
because name conflicts can be avoided.
As a consequence OSN documents are <notice text="easy to extend"/> in that
domain-specific OSN applications can work as expected even if
data from different domains is added to the text they process.
Optionally <link to="https://en.wikipedia.org/wiki/Namespace">qualified</link> symbolic expressions
allow OSN texts to mix data from different domains preserving their own semantics
because name conflicts can be avoided.
As a consequence OSN documents are <notice text="easy to extend"/> in that
domain-specific OSN applications can work as expected even if
data from different domains is added to the text they process.