狠狠撸

ontology formal knowledge petrology 锌械褌褉芯谢芯谐懈褟 芯薪褌芯谢芯谐懈褟 owl owl 2 category wikipedia graph structure program construction attributed graph context-free grammar program syntax program semantics finite labeled graph 褎芯褉屑邪谢褜薪邪褟 褌械芯褉懈褟 fol 泻芯薪械褔薪褘械 屑芯写械谢懈 褎芯褉屑邪谢褜薪邪褟 芯薪褌芯谢芯谐懈褟 formal definition formal theory classification algorithm