| 摘要: |
| F-logic语言是一种基于框架逻辑的逻辑数据语言，它在表示面向对象的特征方面具有较强的能力，但是讨论其操作复杂对象能力的工作还不多见.本文比较了以COL，（complexobjectlanguage）为代表的逻辑数据语言与F-logic语言操作复杂对象的能力.通过两对保持语义的变换，能够将F-logic程序及其Herbrand解释与COL，程序及其Herbrand解释互相转变，且保持程序在相应解释下的真值性质.最后，讨论了否定的影响.本文的工作说明:在不考虑F-logic语言oid生成影响的情况下，F-logic语言与COL，LDL1和ELPS等逻辑数据语言在操作复杂对象方面具有相同的能力. |
| 关键词: 逻辑数据语言 F-logic语言 复杂对象语言 |
| DOI： |
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| 基金项目:本文研究得到国家自然科学基金资助. |
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| ON THE EXPRESSIVE POWER OF F-LOGIC LANGUAGE |
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TIAN Zengping,WANG Yujun,QU Yunyao,SHI Baile
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| Abstract: |
| F-logic language is a logic database language based on frame logic．It is powerful in expressing object-oriented features．However，there was little work in discussing its capability of manipulating complex objects．In this paper，the authors compare the capability of F-logic with that of logic database languages represented by COL (complex object language)．Through tWO pairs of semantic preserving transformations，F-logic programs and their Herbrand interpretations can be transformed into COL programs and their corresponding Herbrand interpretations，and vice versa．Also，the effects of negation are discussed．The results of this paper indicate that，without consider-ation of the effects of OID generating，F-logic language has the same power in manipulat-ing complex objects as COL, LDL1(1ogic database language), and ELPS． |
| Key words: Logic database language F-logic language complex object language. |
