You can't type a fact directly at the prompt. You can add a fact to working memory using the (assert) function (as shown in section 5.2) or you can use the (deffacts) construct to create a group of facts that will then be added to working memory on reset events (as in section 5.5) .
As a general rule, in the HTML manual, the light red blocks show interactive sessions with Jess -- things you can type directly at the prompt -- while the green ones do not. The red ones show the actual "Jess>" prompt; the "number" fact you typed in below is from a green block, and is meant to indicate how the fact data structures look. There are also violet-colored blocks: those are compilable Java code. I'm actually rather proud of what the Jess test suite does to verify the manual. The dialogs in the red blocks are actually parsed from the XML source of the manual and verified: if one of the red blocks says that Jess gives a particular response to a given input, that is actually verified in the test suite. Likewise, the code in the violet blocks is compiled, and if output is shown in the manual, the output is verified correct. The green boxes are the escape mechanism: they can contain pretty much anything, and no validation is done on them. On 10/11/12 4:43 PM, "Grant Rettke" <gret...@acm.org> wrote: >Hi, > >I'm working on > >5.4. Ordered facts > >in > >file:///C:/x86/Jess71p2/docs/memory.html > >with Jess "Jess Version 7.1p2 11/5/2008" > >where there is an example > >Jess> (number (value 6)) > >I expected the ordered fact "number" to get created on-demand but instead >got: > >Jess reported an error in routine Funcall.execute > while executing (number (value 6)). > Message: Undefined function number. > Program text: ( number ( value 6 ) ) at line 1. > >What am I doing wrong? > >Best wishes, > >Grant > >-- >((λ (x) (x x)) (λ (x) (x x))) >http://www.wisdomandwonder.com/ >ACM, AMA, COG, IEEE > > > >-------------------------------------------------------------------- >To unsubscribe, send the words 'unsubscribe jess-users y...@address.com' >in the BODY of a message to majord...@sandia.gov, NOT to the list >(use your own address!) List problems? Notify owner-jess-us...@sandia.gov. >-------------------------------------------------------------------- -------------------------------------------------------------------- To unsubscribe, send the words 'unsubscribe jess-users y...@address.com' in the BODY of a message to majord...@sandia.gov, NOT to the list (use your own address!) List problems? Notify owner-jess-us...@sandia.gov. --------------------------------------------------------------------
