You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Leftmost Derivations (ASU Ch 4.2)<br />
• leftmost replacement (LL grammars)<br />
– E =lm=> - E =lm=> -(E) =lm=> -(EAE) =lm=> -(idAE) =lm=><br />
– -(id+E) =lm=> -(id+id)<br />
– =lm=> means replace the leftmost NT<br />
– if wAc =lm=> wβc and P: A => β then w consists of Ts<br />
– a =lm=> b a derives b by leftmost derivation<br />
– S =lm=> a a is a left-sentential form of G<br />
• rightmost derivation =rm=><br />
– mutatis mutandum<br />
– sometimes called canonical forms<br />
10<br />
14/10/2014 DFR - CC - <strong>Syntax</strong> <strong>Analysis</strong>
Change language