The library now is able to â€¦

I’m curr­ent­ly wri­ting a libra­ry of PHP stuff for our inter­nal use. I’ve been able to make it do a few fun tricks. 

To express a query with a sub­query, I can now do this:
$sube = new Expression('subtable');
$sube->setResultField('id');
$sube->beginGroup('and');
$sube->addTerm('field1','=',$valueA);
$sube->addTerm('field2',' =','expr:now()'); $sube->endGroup;
$e = new Expression('table');
$e->addTerm('field2','not in',$sube);

$XQDB->getObjects($e);

I like that!