The syntactic analysis uses the lexical graph as input. It tries to find a rewriting of the root of the grammar, which would result in one or more of the possible orders of terminal symbols as identified by the lexical analysis. A parse is a rewriting of the root using some syntax rules from the grammar, where the parameters do not contradict the actual parameters specified in the calls or the guards.
The default output of the syntactic analysis is a parse, usually shown as a parse tree, which shows the nonterminals used in the rewriting.