Database : mailtest
Restore  : YES


Operator : sendmail
Number   : 1
Signature: text, text, text, text, text   -> bool
Example  : query sendmail('a subject', 'sender@universe2.com', 'receiver@universe1.com', 'message', 'copytosomeone@universe3.com')
Result   : unpredictable
Remark   : The result depends on the installation and the version of sendmail on the operating system 



Operator : embedTags
Number   : 1
Signature: ((stream (tuple ((x1 T1) ...(xn Tn)))) (ak1, ak2, ak3)) -> (stream (tuple ((ai1 Ti1) ... (ain Tin) (ak2, Tk2) (ak3, Tk3))))
Example  : query testrel feed embedTags[Brief, Brief2, Erfolg] count
Result   : 4