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หลักการที่ 4: คงทนต่อความเปลี่ยนแปลง เนื้อหาต้องคงทนต่อความเปลี่ยนแปลงอย่างเพียงพอ เพื่อให้สามารถนำไปใช้กับเทคโนโลยีต่างๆ


?????? 4.1 ??????????????

??????????????????????????????????????????? ? ?????????????????????????????????????????????

4.1.1 ????????????? (Parsing)

???????????????????????????????????????????? (Markup language) ????????? (Element) ?????????????????????????????????? ?????????????????????????? ID ????????? ??????????????????????????????????????????????????? (????? A)

4.1.2 ???? ???????????

??????????????????????????????? (???????????????????????? ?????????????????????? ? ??????????????????????????) ?????????????????????????? name (????) ??? role (???????) ????????????????????????????????? ????? ??????????????????? ? ????????????????????????????????????????????????????? ??????????????????????????????????????????????????????????????????????????? ???????????????????????????????????????????? (????? A)