Hi Tareq, Currently, the only way to do this is is to write two different patterns, one that searches for three words, and one that searches for two.
Another possibility is to use a GlobNode instead of a VariableNode, this will accept sequences of neighboring words, as one. However, this might not be what you want: the output of a glob is a list. You do ask an interesting question: it would be nice to have this kind of matching. Currently, VariableNode must match exactly one item, and GlobNode must match one or more. A "MaybeNode" that matches zero or one, and a "StarNode" that matches zero or more could be useful. .. But these don't exist, yet. Might not be hard to add ... --linas On Fri, Oct 28, 2016 at 2:47 AM, Tareq Alkhaldi <tareq.alkha...@gmail.com> wrote: > Hi all, > > Is there a way to use the PM to match a partial list as the following? > > Atomspace has this: > > (EvaluationLink > (PredicateNode "pulled@463a5d30-1733-48bc-b188-cb1fcd1d3ee0") > (ListLink > (ConceptNode "James@c597a7ec-60ab-429d-b003-4782200c7a91") > (ConceptNode "pudding@f797c773-b58a-4136-8bad-74b4ad399c63") > (ConceptNode "all@3f71ac77-ef99-4499-883d-2ae3332fdb6a") ;;;;; > This may or may not exist > ) > ) > > Pattern I want to match is: > > (BindLink > (VariableList > (VariableNode "$X") > (VariableNode "$Y") > ) > > (EvaluationLink > (VariableNode "$X") > (ListLink > (ConceptNode "James@6c0671a2-1b11-4dd9-a787-d27d7779a0c8") > (VariableNode "$Y") > ) > ) > (VariableNode "$Y") > ) > > How can I match that without having to add another variable after "$Y" in > the list, knowing that the (ConceptNode "all@...") may not always be > there. > > Can this be done? > > Thanks > > -- > You received this message because you are subscribed to the Google Groups > "opencog" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to opencog+unsubscr...@googlegroups.com. > To post to this group, send email to opencog@googlegroups.com. > Visit this group at https://groups.google.com/group/opencog. > To view this discussion on the web visit https://groups.google.com/d/ > msgid/opencog/764c3a00-c443-46ed-9d05-7aa11ddb4cb8%40googlegroups.com > <https://groups.google.com/d/msgid/opencog/764c3a00-c443-46ed-9d05-7aa11ddb4cb8%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "opencog" group. To unsubscribe from this group and stop receiving emails from it, send an email to opencog+unsubscr...@googlegroups.com. To post to this group, send email to opencog@googlegroups.com. Visit this group at https://groups.google.com/group/opencog. To view this discussion on the web visit https://groups.google.com/d/msgid/opencog/CAHrUA36ZoEyDERjT2YpQLQ%3DQcUtKMCwTLZ1LmN9YZH%3D9_FzZ6w%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
