iso­lat­in1 – An ob­so­lete means to use ISO 8859-1 with TeX

The pack­age rep­re­sents an out­dated mech­a­nism for read­ing ISO Latin-1 (ISO/IEC 8859-1) by means of set­ting the print­ing glyphs in the up­per half of the char­ac­ter set to cat­e­gory code "ac­tive", and defin­ing them all.
While this mech­a­nism is broadly that em­ployed by the stan­dard LaTeX in­pu­tenc pack­age, the stan­dard pack­age has sev­eral ad­van­tages, in­clud­ing a more sat­is­fac­tory ap­proach to un­de­fined char­ac­ter codes, bet­ter in­te­gra­tion with other in­put en­cod­ings and gen­er­ally im­proved ro­bust­ness.