Video: Cov lus qhia tshwj xeeb yog dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
A lus specification yog a yam lus nyob rau hauv computer science siv thaum lub sij hawm kev soj ntsuam systems, cov kev xav tau kev tsom xam, thiab systems tsim los piav qhia txog ib tug system ntawm ib tug ntau dua li ib tug programming. lus , uas yog siv los tsim cov cai executable rau ib qho system.
Ib yam li ntawd, tib neeg nug, dab tsi yog qhov kev cai tshwj xeeb?
FORMAL SPECIFICATION . A raug cai software specification yog ib nqe lus uas hais nyob rau hauv ib hom lus uas nws cov lus, syntax, thiab semantics raug cai. Qhov xav tau ib raug cai semantic txhais txhais tau tias tus specification hom lus tsis tuaj yeem ua raws li hom lus; nws yuav tsum ua raws li kev ua lej.
Ib tug kuj yuav nug, uas yog ib txoj kev cai? Cov txheej txheem raug cai yog cov txheej txheem siv los ua qauv complex systems ua lej. Thaum raug cai specification, ib tug engineer los yog designer nruj nreem txhais ib tug system siv ib tug qauv lus-feem ntau yog siv a raug cai , lej syntax thiab semantics uas tshem tawm imprecision thiab ambiguity.
Dhau li ntawm qhov no, vim li cas peb thiaj xav tau kev qhia tshwj xeeb?
Ib qho ntawm cov laj thawj tseem ceeb nyob ntawd yog txaus siab rau formal specifications yog tias lawv yuav muab lub peev xwm los ua pov thawj ntawm kev siv software. Cov ntaub ntawv pov thawj no tuaj yeem siv los ua pov thawj a specification , txheeb xyuas qhov tseeb ntawm kev tsim, lossis los ua pov thawj tias qhov kev pab cuam txaus siab a specification.
Dab tsi yog Z specification lus?
d/ yog formal lus specification siv los piav qhia thiab ua qauv kev suav tshuab. Nws yog tsom rau qhov tseeb specification ntawm computer programs thiab computer-based systems feem ntau.
Pom zoo:
Dab tsi yog ib lo lus tshwj xeeb ntawm cov ntsiab lus?
Muab qhov yooj yim, cov lus tshwj xeeb tshwj xeeb, tseem hu ua Tier 3 cov lus, yog cov lus qhia lossis cov ntsiab lus tseem ceeb rau ib qho kev kawm. Piv txwv li, chemistry thiab cov ntsiab lus ob qho tib si poob rau hauv cov lus hais txog kev tshawb fawb, thaum hais lus thiab nqe lus cuam tshuam nrog kev ua lus Askiv (xws li, peb qhov kev kawm nyiam)
Cov lus piav qhia twg txhais cov cim tshwj xeeb rau JPA qhov chaw?
Thaum txuas ntxiv cov khoom mus rau hauv cov ntaub ntawv koj xav tau tus cim tshwj xeeb rau cov khoom, qhov no tso cai rau koj los nug cov khoom, txhais kev sib raug zoo rau cov khoom, thiab hloov kho thiab tshem tawm cov khoom. Hauv JPA cov khoom id yog txhais los ntawm @Id annotation thiab yuav tsum sib haum mus rau qhov tseem ceeb ntawm cov khoom lub rooj
Dab tsi yog daim teb uas muaj cov ntaub ntawv tshwj xeeb rau cov ntaub ntawv?
Kev teeb tsa thawj tus yuam sij Tus yuam sij tseem ceeb yog daim teb uas muaj cov ntaub ntawv tshwj xeeb rau txhua cov ntaub ntawv
Cov ntsiab lus tshwj xeeb yog dab tsi?
Muab qhov yooj yim, cov lus tshwj xeeb tshwj xeeb, tseem hu ua Tier 3 cov lus, yog cov lus qhia lossis cov ntsiab lus tseem ceeb rau ib qho kev kawm. Piv txwv li, chemistry thiab cov ntsiab lus ob qho tib si poob rau hauv cov lus hais txog kev tshawb fawb, thaum hais lus thiab nqe lus cuam tshuam nrog kev ua lus Askiv (xws li, peb qhov kev kawm nyiam)
Lub sij hawm nyob rau hauv ontology yog dab tsi yog hais txog cov lus piav qhia hierarchical thiab cov lus hais txog ib qho tshwj xeeb?
Lub schema yog ib lo lus ontology uas hais txog cov lus piav qhia hierarchical thiab cov lus hais txog ib lub npe. Ib lub npe sawv cev rau tag nrho lub tuam txhab lossis kev faib hauv ib lub tuam txhab. Ib tug cwj pwm yog ib tug yam ntxwv tshwj xeeb hais txog ib chav kawm, uas yog ib hom khoom