Subject: Testing if an attribute is present From: Aidan Killian <aidan@xxxxxxxx> Date: Mon, 27 Oct 1997 16:27:32 -0800 |
Hi, I am trying to test if an attribute is present in an element (I do not care if it is expicitly specified or defaulted). Here is the situation: an element (cd) can have 3 attributes: "day", "month" & "year". The first (day) is optional, the others are required. I want to output: YYYY-MM-DD or YYYY-MM if 'day' is absent. I get the following error whenever 'day' is absent (no matter what I put in the 'if' statement): jade:metafilter.dsl:79:2:E: 1st argument for primitive "literal" of wrong type: "#f" not a string If I leave out the logic I get a different (understandable) error. Thanks, Aidan Killian (B.T.W. I am working on getting DSSSL training) ;;;;;;;;;;;;;;;;; ;; output date ;; ;;;;;;;;;;;;;;;;; (define (output-date) ;;(if (equal? #t #f) (attribute-string "day" (current-node)) (string-append (attribute-string "year" (current-node)) "-" (attribute-string "month" (current-node)) (if (attribute-string "day") ;; if "day" is present (string-append "-" (attribute-string "day" (current-node))) ""))) (element CD (make element gi: "CREATEDDATE" (make sequence (literal (output-date)) (empty-sosofo)))) ;; supress proper content DSSSList info and archive: http://www.mulberrytech.com/dsssl/dssslist
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