Video: Internal DTD thiab External DTD yog dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
A DTD yog hu ua ib internal DTD ifelements raug tshaj tawm hauv cov ntaub ntawv XML. Siv nws li internal DTD , standalone attribute hauv XML tshaj tawm yuav tsum tau teem rau yog. Qhov no txhais tau tias cov lus tshaj tawm ua haujlwm ywj siab ntawm sab nraud qhov chaw.
Ntxiv mus, sab nraud DTD yog dab tsi?
Ib External DTD yog ib qho uas nyob hauv ib daim ntawv sib cais. Yuav siv lub External DTD , koj yuav tsum txuas mus rau nws los ntawm koj cov ntaub ntawv XML los ntawm kev muab URI ntawm cov DTD file. This URI feem ntau yog nyob rau hauv daim ntawv ntawm URL.
DTD yog dab tsi thiab nws hom? Ib daim ntawv hom txhais ( DTD ) yog ib daim ntawv teev cov ntawv tshaj tawm uas txhais cov ntaub ntawv hom rau aSGML-tsev neeg markup lus (GML, SGML, XML, HTML). Nws txhais cov qauv ntaub ntawv nrog cov npe ntawm cov khoom siv tau thiab cov khoom siv. A DTD tuaj yeem tshaj tawm hauv kab hauv XMLdocument, lossis raws li kev siv sab nraud.
Qhov thib ob, ob hom DTD yog dab tsi?
Muaj ob hom ntawm sab nraud DTDs : private, thiab public. Cov Cai: Yog tias muaj cov ntsiab lus, cov yam ntxwv, cov ntsiab lus raug siv hauv XML cov ntaub ntawv uas tau hais los yog txhais hauv ib qho chaw sab nraud DTD , standalone="no" yuav tsum suav nrog hauv XML tshaj tawm.
DTD piv txwv yog dab tsi?
A DTD txhais cov cim npe thiab cov cwj pwm siv hauv ib daim ntawv XML lossis HTML. Txhua yam uas tau teev tseg hauv a DTD tuaj yeem siv rau hauv cov ntaub ntawv no, nrog rau cov cim npe ua ntej thiab cov cwj pwm uas yog ib feem ntawm txhua hom lus. Cov nram qab no yog piv txwv ntawm a DTD siv los txhais lub tsheb: <!
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