> > Why not just dump directly from the atomspace? > The atomspace has a lot of other atoms and links that might be what the user is asking for, I'm parsing the output of a pattern matcher function.
On Saturday, June 29, 2019 at 11:59:01 PM UTC+3, linas wrote: > > > > On Sat, Jun 29, 2019 at 3:54 PM Xabush Semrie <[email protected] > <javascript:>> wrote: > >> >> why the heck would you need to "parse" atomese? >> >> What are you actually trying to do? >> >> >> I am converting it to JSON for graph visualization with Cytoscape.js for >> an annotation service. For example, >> (EvaluationLink >> (PredicateNode "expresses") >> (ListLink >> (GeneNode "MAP2K4") >> (MoleculeNode "Uniprot:Q5U0B8"))) >> >> The above will be "parsed" into the following JSON >> { >> "data": {"source": "MAP2K4", "target": "Uniprot:Q5U0B8", "name": >> "expresses", "group": "edges"} >> } >> >> > Why not just dump directly from the atomspace? > > >> Especially since it already comes with a built-in parser? >> >> >> Maybe I am confusing something here, but I didn't know any parser existed >> for my use case. >> > > ? Of course there is. It's called "the atomspace". > > --linas > >> >> >> On Saturday, June 29, 2019 at 11:43:55 PM UTC+3, linas wrote: >>> >>> Dumb question: why the heck would you need to "parse" atomese? >>> Especially since it already comes with a built-in parser? What are you >>> actually trying to do? --linas >>> >>> On Sat, Jun 29, 2019 at 10:04 AM Xabush Semrie <[email protected]> >>> wrote: >>> >>>> Hi, >>>> >>>> I have been working recently on LALR parser to parse atomese to >>>> JSON(code can be found here >>>> <https://github.com/Habush/annotation-scheme/blob/de66cd29c375321e5c7a14741a91c40ac40fb0b9/helpers/atomese-parser.scm#L98>). >>>> >>>> I initially used the same LALR parser generator used by GHOST found in >>>> *(system >>>> base lalr)* module with a similar lexer generator (in my case I >>>> precompiled the regex patterns for performance gain). However, I was >>>> getting very bad performance and it took way too long to parse moderately >>>> sized atomese files. It didn't help that the module didn't provided its >>>> own >>>> lexer generator and in the case of the GHOST code, the regex patterns were >>>> not precompiled which would further degrade the performance. As a result, >>>> I >>>> started looking at alternatives and found the nyacc project. >>>> >>>> After rewriting the code using nyacc, I found that the nyacc parser >>>> generator on average is 5-6X faster than the previous parser generator >>>> (which used by GHOST) for the same file. In addition to the performance >>>> improvement, it removes the need to provide a manually written lexer >>>> generator, has support for mid-rule context actions for complicated >>>> production rules, has a better debugging and "logging" capabilities and >>>> (although minor) doesn't require to list all the terminal symbols. Also >>>> the >>>> project is also being actively developed. >>>> >>>> Hence, I deduced the GHOST parser could also benefit the same >>>> performance improvements and thought sharing this here. I am happy to work >>>> on porting the LALR parser from the current one to nyacc if this gets >>>> traction. >>>> >>>> -- >>>> 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 [email protected]. >>>> To post to this group, send email to [email protected]. >>>> 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/f3d23857-71b2-40a8-b99d-86249f9bd71a%40googlegroups.com >>>> >>>> <https://groups.google.com/d/msgid/opencog/f3d23857-71b2-40a8-b99d-86249f9bd71a%40googlegroups.com?utm_medium=email&utm_source=footer> >>>> . >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >>> >>> -- >>> cassette tapes - analog TV - film cameras - you >>> >> -- >> 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 [email protected] <javascript:>. >> To post to this group, send email to [email protected] >> <javascript:>. >> 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/c1ab0355-de77-428b-b8ce-baba885dd157%40googlegroups.com >> >> <https://groups.google.com/d/msgid/opencog/c1ab0355-de77-428b-b8ce-baba885dd157%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> > > > -- > cassette tapes - analog TV - film cameras - you > -- You received this message because you are subscribed to the Google Groups "opencog" group. 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