Proceedings of the Third International Conference on Web Information Systems Engineering, 2002. WISE 2002.最新文献_第4页

Towards declarative XML querying 迈向声明性XML查询

Proceedings of the Third International Conference on Web Information Systems Engineering, 2002. WISE 2002. Pub Date : 2002-12-12 DOI: 10.1109/WISE.2002.1181650

Mengchi Liu, T. Ling

{"title":"Towards declarative XML querying","authors":"Mengchi Liu, T. Ling","doi":"10.1109/WISE.2002.1181650","DOIUrl":"https://doi.org/10.1109/WISE.2002.1181650","url":null,"abstract":"Extracting data from XML documents is an important issue for XML research and development. However, how XML documents are viewed determines how they can be queried. We first describe a natural way of viewing XML documents as in complex object data models so that we can easily comprehend XML data from a database point of view. We then illustrate how to use logical variables to extract data from XML documents. We also describe a rule-based declarative query language for XML. We demonstrate that our rule-based language provides a uniform framework that has the following advantages over other XML query languages including XQuery. First, it provides a natural way of separating querying and result constructing using the body and head respectively. Second, several rules can be used for the same query so that complex queries can be expressed in a simple and natural way. Also, its use of logical variables and rules makes many functions and operators in XQuery and XPath unnecessary or definable constructively. Finally, it provides natural and direct support for recursion as in deductive databases and has logical foundations that have played a significant role in database research in the past.","PeriodicalId":392999,"journal":{"name":"Proceedings of the Third International Conference on Web Information Systems Engineering, 2002. WISE 2002.","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132344531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

A content-based resource location mechanism in PeerIS PeerIS中基于内容的资源定位机制

Proceedings of the Third International Conference on Web Information Systems Engineering, 2002. WISE 2002. Pub Date : 2002-12-12 DOI: 10.1109/WISE.2002.1181664

Bo Ling, Zhiguo Lu, W. Ng, B. Ooi, K. Tan, Aoying Zhou

引用次数: 12

Formal authorization allocation approaches for role-based access control based on relational algebra operations 基于关系代数操作的基于角色的访问控制的正式授权分配方法

Proceedings of the Third International Conference on Web Information Systems Engineering, 2002. WISE 2002. Pub Date : 2002-12-12 DOI: 10.1109/WISE.2002.1181666

Hua Wang, Jinli Cao, Yanchun Zhang

{"title":"Formal authorization allocation approaches for role-based access control based on relational algebra operations","authors":"Hua Wang, Jinli Cao, Yanchun Zhang","doi":"10.1109/WISE.2002.1181666","DOIUrl":"https://doi.org/10.1109/WISE.2002.1181666","url":null,"abstract":"We develop formal authorization allocation algorithms for role-based access control (RBAC). The formal approaches are based on relational structure, and relational algebra and operations. The process of user-role assignments is an important issue in RBAC because it may modify the authorization level or imply high-level confidential information to be derived while users change positions and request different roles. There are two types of problems which may arise in user-role assignment. One is related to the authorization granting process. When a role is granted to a user this role may conflict with other roles of the user or together with this role; the user may have or derive a high level of authority. Another is related to authorization revocation. When a role is revoked from a user, the user may still have the role from other roles. To solve these problems, this paper presents an authorization granting algorithm, and weak revocation and strong revocation algorithms that are based on relational algebra. The algorithms can be used to check conflicts and therefore to help allocate roles without compromising the security in RBAC. We describe how to use the new algorithms with an anonymity scalable payment scheme. Finally, comparisons with other related work are discussed.","PeriodicalId":392999,"journal":{"name":"Proceedings of the Third International Conference on Web Information Systems Engineering, 2002. WISE 2002.","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114499526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

A unified framework for clustering heterogeneous Web objects 用于集群异构Web对象的统一框架

Proceedings of the Third International Conference on Web Information Systems Engineering, 2002. WISE 2002. Pub Date : 2002-12-12 DOI: 10.1109/WISE.2002.1181653

Hua-Jun Zeng, Zheng Chen, Wei-Ying Ma

引用次数: 65