We'd need something like a :

{quote}
ISimpleReadStream *IPropertyTreee::getPropBinStream(const char *xpath);
{quote}

not very significant in the scheme of things here, but would be nice. I'll open a separate issue for it.
Don't know how many other places would benefit, single binary properties shouldn't be _that_ big in Dali or _that_ frequent, so I doubt it would make a huge difference to anything at the moment.