../code/conceptPage.scroll id isbl name ISBL appeared 1980 tags pl lab IBM country United States wikipedia https://en.wikipedia.org/wiki/ISBL example OS = ORDERS * SUPPLIERS LIST OS: NAME="Brooks" % SNAME, ITEM, PRICE summary ISBL (Information Systems Base Language) is the relational algebra notation that was invented for PRTV, one of the earliest database management systems to implement E.F. Codd's relational model of data. created 2006 backlinksCount 42 pageId 3946520 revisionCount 51 dailyPageViews 13 appeared 1980