Search results for "urls"

Hits ?▲	Authors	Title	Venue	Year	Link	Author keywords
112	Santanu Kolay, Ali Dasdan	The value of socially tagged urls for a search engine.	WWW	2009	DBLP DOI BibTeX RDF	content quality, social bookmarking, delicious
102	Anirban Dasgupta 0001, Ravi Kumar 0001, Amit Sasturkar	De-duping URLs via rewrite rules.	KDD	2008	DBLP DOI BibTeX RDF	URL normalization, de-duping, rewrite rules
75	Vasileios Kandylas, Ali Dasdan	The utility of tweeted URLs for web search.	WWW	2010	DBLP DOI BibTeX RDF	content quality, shortened urls, twitter, microblogging
71	Charles Song, Vibha Sazawal	Information-Hiding URLs for EasierWebsite Evolution.	WSE	2006	DBLP DOI BibTeX RDF
67	Jean-Loup Guillaume, Matthieu Latapy, Laurent Viennot	Efficient and Simple Encodings for the Web Graph.	WAIM	2002	DBLP DOI BibTeX RDF	Web links, Compression, Web graph, URLs
61	Mehdi Hosseini, Hassan Abolhassani	Hierarchical Co-clustering for Web Queries and Selected URLs.	WISE	2007	DBLP DOI BibTeX RDF
52	Tao Lei, Rui Cai, Jiang-Ming Yang, Yan Ke, Xiaodong Fan, Lei Zhang 0001	A pattern tree-based approach to learning URL normalization rules.	WWW	2010	DBLP DOI BibTeX RDF	url deduplication, url normalization, url pattern
52	Yuetang Deng, Phyllis G. Frankl, Jiong Wang	Testing web database applications.	ACM SIGSOFT Softw. Eng. Notes	2004	DBLP DOI BibTeX RDF	database, software testing, web application
52	Mohamed Hammami, Youssef Chahir, Liming Chen 0002	WebGuard: Web Based Adult Content Detection and Filtering System.	Web Intelligence	2003	DBLP DOI BibTeX RDF
52	N. Swaminathan, S. V. Raghavan	Intelligent Prefetch in WWW Using Client Behavior Characterization.	MASCOTS	2000	DBLP DOI BibTeX RDF	Web Client Characterization, Genetic Algorithms, Prefetching
50	Justin Ma, Lawrence K. Saul, Stefan Savage, Geoffrey M. Voelker	Beyond blacklists: learning to detect malicious web sites from suspicious URLs.	KDD	2009	DBLP DOI BibTeX RDF	malicious web sites, supervised learning, L1-regularization
50	Justin Ma, Lawrence K. Saul, Stefan Savage, Geoffrey M. Voelker	Identifying suspicious URLs: an application of large-scale online learning.	ICML	2009	DBLP DOI BibTeX RDF
50	Uri Schonfeld, Ziv Bar-Yossef, Idit Keidar	Do not crawl in the DUST: different URLs with similar text.	WWW	2006	DBLP DOI BibTeX RDF	similarity, rules, mining, duplicates
41	Tadanobu Furukawa, Seishi Okamoto, Yutaka Matsuo, Mitsuru Ishizuka	Prediction of social bookmarking based on a behavior transition model.	SAC	2010	DBLP DOI BibTeX RDF	recommender system, collaborative filtering, Markov chain, information flow, social tagging
41	Hema Swetha Koppula, Krishna P. Leela, Amit Agarwal, Krishna Prasad Chitrapura, Sachin Garg, Amit Sasturkar	Learning URL patterns for webpage de-duplication.	WSDM	2010	DBLP DOI BibTeX RDF	site-specific delimiters, webpage de-duplication, search engines, decision trees, generalization, mapreduce, page importance
41	Hongbo Deng, Irwin King, Michael R. Lyu	Entropy-biased models for query representation on the click graph.	SIGIR	2009	DBLP DOI BibTeX RDF	click frequency, click graph, entropy-biased model, inverse query frequency, user frequency
41	Martin Klein 0001, Michael L. Nelson	Revisiting Lexical Signatures to (Re-)Discover Web Pages.	ECDL	2008	DBLP DOI BibTeX RDF
41	Rosario De Chiara, Andrew Fish	eul.icio.us: Euler Diagrams for del.icio.us.	IV	2008	DBLP DOI BibTeX RDF
41	Animesh Tripathy, Prashanta Kumar Patra	A Web Mining Architectural Model of Distributed Crawler for Internet Searches Using PageRank Algorithm.	APSCC	2008	DBLP DOI BibTeX RDF
41	Anirban Banerjee, Dhiman Barman, Michalis Faloutsos, Laxmi N. Bhuyan	Cyber-Fraud is One Typo Away.	INFOCOM	2008	DBLP DOI BibTeX RDF
41	Mehdi Hosseini, Hassan Abolhassani	Mining Search Engine Query Log for Evaluating Content and Structure of a Web Site.	Web Intelligence	2007	DBLP DOI BibTeX RDF
41	Daniel Gomes, Mário J. Silva	Modelling information persistence on the web.	ICWE	2006	DBLP DOI BibTeX RDF	content persistence, tomba, url persistence
41	Xin Chen 0034, Xiaodong Zhang 0001	Popularity-Based PPM: An Effective Web Prefetching Technique for High Accuracy and Low Storage.	ICPP	2002	DBLP DOI BibTeX RDF
41	Shinichi Hiraiwa, Youji Kohda	Info-Plaza: A social information filtering system for the World-Wide Web.	ICPADS	1996	DBLP DOI BibTeX RDF	nternet, Info-Plaza, social information filtering system, XPlaza, Plaza-Server, GUI-editor, URL-Maps, database entries, World-Wide Web, database, database management systems, client-server systems, client-server system
40	Ziv Bar-Yossef, Idit Keidar, Uri Schonfeld	Do not crawl in the DUST: Different URLs with similar text.	ACM Trans. Web	2009	DBLP DOI BibTeX RDF	URL normalization, Search engines, antialiasing, crawling, duplicate detection
40	Max Hinne, Wessel Kraaij, Stephan Raaijmakers, Suzan Verberne, Theo P. van der Weide, Maarten van der Heijden	Annotation of URLs: more than the sum of parts.	SIGIR	2009	DBLP DOI BibTeX RDF	URL annotation, click data
40	Mihai Stroe, Radu Berinde, Cosmin Negruseri, Dan Popovici	An approximate string matching approach for handling incorrectly typed urls.	CIKM	2008	DBLP DOI BibTeX RDF	url correction
40	Deepayan Chakrabarti, Ravi Kumar 0001, Kunal Punera	Generating succinct titles for web URLs.	KDD	2008	DBLP DOI BibTeX RDF	quicklinks, web page title generation, sitemaps
40	Ziv Bar-Yossef, Idit Keidar, Uri Schonfeld	Do not crawl in the dust: different urls with similar text.	WWW	2007	DBLP DOI BibTeX RDF	URL normalization, search engines, crawling, duplicate detection, anti-aliasing
38	Maxime Veit, Dirk Müllmann, Melanie Volkamer	Technische und datenschutzrechtliche Einordnung von Weiterleitungs-URLs in E‑Mails - Was bei Weiterleitungs-URLs in E‑Mails aus Marketinggründen zu beachten ist.	Comput. und Recht	2023	DBLP DOI BibTeX RDF
38	Kyongho Min, William H. Wilson, Yoo-Jin Moon	Impacts of Linked URLs in Social Media - Preliminary Analysis of Linked URLs for Health-Related Social Media Postings.	PKAW	2014	DBLP DOI BibTeX RDF
38	Natarajan Kannan, Toufeeq Hussain	Live URLs: breathing life into URLs.	WWW	2006	DBLP DOI BibTeX RDF	fragment identifier, web addressing, HTML, HTTP, browsers, web content, ACM proceedings, URL
36	R. Gandhi, Benjamin B. Bederson, G. Kumar, Ben Shneiderman	Domain Name Based Visualization of Web Histories in a Zoomable User Interface.	DEXA Workshops	2000	DBLP DOI BibTeX RDF	domain name based visualization, hypertext links, Web browser companion, Domain Tree Browser, tree structured visual navigation history, zoomable window, World Wide Web, zoomable user interface, information resources, URLs, thumbnails, domain name, Web histories, hypertext systems
31	Yang Song 0008, Li-wei He	Optimal rare query suggestion with implicit user feedback.	WWW	2010	DBLP DOI BibTeX RDF	random walk, pseudo-relevance feedback, query suggestion
31	Ahmed Obied, Reda Alhajj	Fraudulent and malicious sites on the web.	Appl. Intell.	2009	DBLP DOI BibTeX RDF	Fraudulent, Malicious, Web, Search engines, Spam, Malware, Proxy, Phishing, Crawlers, Pharming
31	Mauricio Marín, Rodrigo Paredes, Carolina Bonacic	High-performance priority queues for parallel crawlers.	WIDM	2008	DBLP DOI BibTeX RDF	priority queues, parallel and distributed computing
31	Sang Ho Lee 0004, Sung Jin Kim, Hyo Sook Jeong	How to Evaluate the Effectiveness of URL Normalizations.	Human.Society@Internet	2005	DBLP DOI BibTeX RDF
31	Tao Peng 0003, Wanli Zuo, Yilin Liu	Characterization of Evaluation Metrics in Topical Web Crawling Based on Genetic Algorithm.	ICNC (2)	2005	DBLP DOI BibTeX RDF
31	Andrei Z. Broder, Marc Najork, Janet L. Wiener	Efficient URL caching for world wide web crawling.	WWW	2003	DBLP DOI BibTeX RDF	URL caching, distributed crawlers, web graph models, caching, crawling, web crawlers
31	Terence Kelly, Jeffrey C. Mogul	Aliasing on the world wide web: prevalence and performance implications.	WWW	2002	DBLP DOI BibTeX RDF	duplicate suppression, duplicate transfer detection, redundant transfers, resource modification, WWW, world wide web, performance analysis, caching, HTTP, aliasing, DTD, cache hierarchies, Zipf's law, hypertext transfer protocol
31	Kwang Mong Sim, Pui Tak Wong	Web-Based Information Retrieval Using Agent and Ontology.	Web Intelligence	2001	DBLP DOI BibTeX RDF
31	Nikos Bogonikolos, Dimitris Fragoudis, Spiros Likothanassis	"ARCHIMIDES" An Intelligent Agent for Adaptive Personalized Navigation within a WEB Server.	HICSS	1999	DBLP DOI BibTeX RDF
31	Diwakar Krishnamurthy, Jerome A. Rolia	Predicting the QoS of an electronic commerce server: those mean percentiles.	SIGMETRICS Perform. Evaluation Rev.	1998	DBLP DOI BibTeX RDF
29	Md. Hijbul Alam, JongWoo Ha, SangKeun Lee 0001	Fractional PageRank Crawler: Prioritizing URLs Efficiently for Crawling Important Pages Early.	DASFAA	2009	DBLP DOI BibTeX RDF
29	Kumar Chellapilla, Anton Mityagin, Denis Xavier Charles	GigaHash: scalable minimal perfect hashing for billions of urls.	WWW	2007	DBLP DOI BibTeX RDF	minimal perfect hashing, space efficient hash table, web search engine, perfect hash function
29	Jianping Zhang, Jason Qin, Qiuming Yan	The Role of URLs in Objectionable Web Content Categorization.	Web Intelligence	2006	DBLP DOI BibTeX RDF
25	Saeed Abu-Nimeh, Thomas M. Chen, Omar A. Alzubi	Malicious and Spam Posts in Online Social Networks.	Computer	2011	DBLP DOI BibTeX RDF	Uniform resource locators, Security, Spam, Malware, Facebook, Online social networks, URLs
25	Benjamin Markines, Filippo Menczer	A scalable, collaborative similarity measure for social annotation systems.	Hypertext	2009	DBLP DOI BibTeX RDF	maximum information path, web 2.0, tags, folksonomy, urls
25	W. Neville Holmes	The Internet, the Web, and the Chaos.	Computer	2005	DBLP DOI BibTeX RDF	Web URLs, Internet, search engines, computing profession
25	Seung-Taek Park, David M. Pennock, C. Lee Giles, Robert Krovetz	Analysis of lexical signatures for improving information persistence on the World Wide Web.	ACM Trans. Inf. Syst.	2004	DBLP DOI BibTeX RDF	Broken URLs, dead links, lexical signatures, robust hyperlinks, information retrieval, World Wide Web, digital libraries, indexing, search engines, TREC, inverse document frequency, term frequency
25	Monica M. C. Schraefel, Yuxiang Zhu	Hunter gatherer: a collection making tool for the web.	CHI Extended Abstracts	2002	DBLP DOI BibTeX RDF	interaction design, hypertext, collections, URLs
25	Wessel Kraaij, Thijs Westerveld, Djoerd Hiemstra	The Importance of Prior Probabilities for Entry Page Search.	SIGIR	2002	DBLP DOI BibTeX RDF	entry page search, prior probabilities, parameter estimation, language models, links, URLs
25	Seung-Taek Park, David M. Pennock, C. Lee Giles, Robert Krovetz	Analysis of lexical signatures for finding lost or related documents.	SIGIR	2002	DBLP DOI BibTeX RDF	broken URLs, dead links, lexical signatures, robust hyperlinks, information retrieval, world wide web, indexing, search engines, libraries, digital, TREC, inverse document frequency, term frequency
21	Anlei Dong, Ruiqiang Zhang, Pranam Kolari, Jing Bai, Fernando Diaz 0001, Yi Chang 0001, Zhaohui Zheng, Hongyuan Zha	Time is of the essence: improving recency ranking using Twitter data.	WWW	2010	DBLP DOI BibTeX RDF	recency modeling, recency ranking, Twitter
21	Amit Agarwal, Hema Swetha Koppula, Krishna P. Leela, Krishna Prasad Chitrapura, Sachin Garg, Pavan Kumar GM, Chittaranjan Haty, Anirban Roy, Amit Sasturkar	URL normalization for de-duplication of web pages.	CIKM	2009	DBLP DOI BibTeX RDF	url de-duplication, search engines, decision tree, page importance
21	Jiannan Wang 0001, Guoliang Li 0001, Jianhua Feng	Automatic URL completion and prediction using fuzzy type-ahead search.	SIGIR	2009	DBLP DOI BibTeX RDF	URL completion, type-ahead search, fuzzy search
21	Mark James Carman, Mark Baillie, Robert Gwadera, Fabio Crestani	A statistical comparison of tag and query logs.	SIGIR	2009	DBLP DOI BibTeX RDF	web search, tag, folksonomy, query log
21	Pedro García López, Marc Espelt	To: //: towards an open namespace for web resources.	Hypertext	2009	DBLP DOI BibTeX RDF	top level domains, web naming, namespaces
21	Mark James Carman, Mark Baillie, Fabio Crestani	Tag data and personalized information retrieval.	SSM	2008	DBLP DOI BibTeX RDF	tagging, folksonomy, personalized information retrieval
21	Tyler Moore 0001, Richard Clayton 0001	Evaluating the Wisdom of Crowds in Assessing Phishing Websites.	Financial Cryptography	2008	DBLP DOI BibTeX RDF
21	Yang Li 0002, Binxing Fang, Li Guo 0001, Zhihong Tian, Yongzheng Zhang 0002, Zhi-Gang Wu	UBSF: A novel online URL-Based Spam Filter.	ISCC	2008	DBLP DOI BibTeX RDF
21	Yuekui Yang, Yajun Du, Jingyu Sun, Yufeng Hai	A Topic-Specific Web Crawler with Concept Similarity Context Graph Based on FCA.	ICIC (2)	2008	DBLP DOI BibTeX RDF	Topic-specific spider, Search engine, Formal concept analysis
21	Qi Liu, Minghu Jiang, Zhi Chen	Query Recommendation with TF-IQF Model and Popularity Factor.	FSKD (4)	2008	DBLP DOI BibTeX RDF
21	Jiang Wang 0008, Anup K. Ghosh, Yih Huang	Web Canary: A Virtualized Web Browser to Support Large-Scale Silent Collaboration in Detecting Malicious Web Sites.	CollaborateCom	2008	DBLP DOI BibTeX RDF	Web browser security, honey client, virtualization, botnets, spyware, malicious code
21	Paolo Bottoni, Michele Cuomo, Stefano Levialdi, Emanuele Panizzi, Marco Passavanti, Rosa Trinchese	Differences and Identities in Document Retrieval in an Annotation Environment.	DNIS	2007	DBLP DOI BibTeX RDF
21	Divakar Yadav, Ashok Kumar Sharma, J. P. Gupta, N. Garg, A. Mahajan	Architecture for Parallel Crawling and Algorithm for Change Detection in Web Pages.	ICIT	2007	DBLP DOI BibTeX RDF
21	Shuyi Zheng, Ruihua Song, Ji-Rong Wen, Di Wu	Joint optimization of wrapper generation and template detection.	KDD	2007	DBLP DOI BibTeX RDF	information extraction, wrapper, template detection
21	Daniel Gomes, André L. Santos 0001, Mário J. Silva	Managing duplicates in a web archive.	SAC	2006	DBLP DOI BibTeX RDF
21	Chandrani Sinha Ray, Dion Hoe-Lian Goh, Schubert Foo	The Effect of Lexical Relationships on the Quality of Query Clusters.	ICADL	2006	DBLP DOI BibTeX RDF	Collaborative Querying, WordNet, Query Clustering
21	Tao Peng 0003, Fengling He, Wanli Zuo, Changli Zhang	Adaptive Topical Web Crawling for Domain-Specific Resource Discovery Guided by Link-Context.	MICAI	2006	DBLP DOI BibTeX RDF
21	Long-Zhen Duan, Mei Fan, Long-Jun Huang	Web User Access Pattern Mining Based on Kohonen Neural Network.	IAT Workshops	2006	DBLP DOI BibTeX RDF
21	Akiyoshi Nakamizo, Toshinari Iida, Atsuyuki Morishima, Shigeo Sugimoto, Hiroyuki Kitagawa	A Tool to Compute ReliableWeb Links and Its Applications.	ICDE Workshops	2005	DBLP DOI BibTeX RDF
21	Mariângela Vanzin, Karin Becker	Ontology-Based Rummaging Mechanisms for the Interpretation of Web Usage Patterns.	EWMF/KDO	2005	DBLP DOI BibTeX RDF
21	Sang Ho Lee 0004, Sung Jin Kim, Seok-Hoo Hong	On URL Normalization.	ICCSA (2)	2005	DBLP DOI BibTeX RDF
21	Nen-Fu Huang, Rong-Tai Liu, Chih-Hao Chen, Ying-Tsuen Chen, Li-Wen Huang	A Fast URL Lookup Engine for Content-Aware Multi-Gigabit Switches.	AINA	2005	DBLP DOI BibTeX RDF
21	Janez Brank, Natasa Milic-Frayling, Anthony Frayling, Gavin Smyth	Predictive Algorithms for Browser Support of Habitual User Activities on the Web.	Web Intelligence	2005	DBLP DOI BibTeX RDF
21	Emilio Di Giacomo, Walter Didimo, Luca Grilli 0001, Giuseppe Liotta	A Topology-Driven Approach to the Design of Web Meta-search Clustering Engines.	SOFSEM	2005	DBLP DOI BibTeX RDF
21	Sung Jin Kim, Sang Ho Lee 0004	An Empirical Study on the Change of Web Pages.	APWeb	2005	DBLP DOI BibTeX RDF
21	Cecelia M. Brown	The Matthew Effect of the Annual Reviews series and the flow of scientific communication through the World Wide Web.	Scientometrics	2004	DBLP DOI BibTeX RDF
21	Min-Yen Kan	Web page classification without the web page.	WWW (Alternate Track Papers & Posters)	2004	DBLP DOI BibTeX RDF	abbreviation expansion, uniform resource locator, text categorization, word segmentation
21	Olfa Nasraoui, Mrudula Pavuluri	Complete This Puzzle: A Connectionist Approach to Accurate Web Recommendations Based on a Committee of Predictors.	WebKDD	2004	DBLP DOI BibTeX RDF
21	Daniel Oberle, Bettina Berendt, Andreas Hotho, Jorge Gonzalez	Conceptual User Tracking.	AWIC	2003	DBLP DOI BibTeX RDF	web (usage) mining, ontology, user tracking, semantic portal
21	Yasuhito Asano, Hiroshi Imai, Masashi Toyoda, Masaru Kitsuregawa	Finding Neighbor Communities in the Web Using Inter-site Graph.	DEXA	2003	DBLP DOI BibTeX RDF
21	Ben Choi 0002, Qing Guo	Applying Semantic Links for Classifying Web Pages.	IEA/AIE	2003	DBLP DOI BibTeX RDF
21	Yasuhito Asano, Hiroshi Imai, Masashi Toyoda, Masaru Kitsuregawa	Applying the Site Information to the Information Retrieval from the Web.	WISE	2002	DBLP DOI BibTeX RDF
21	Aoying Zhou, Fang Xiong, Weining Qian	An Empirical Study of Learning-Based Web Search.	WAIM	2002	DBLP DOI BibTeX RDF
21	Gerco Ballintijn, Maarten van Steen, Andrew S. Tanenbaum	Scalable Human-Friendly Resource Names.	IEEE Internet Comput.	2001	DBLP DOI BibTeX RDF	wide-area systems, scalability, DNS, naming, resource location
21	Steve Lawrence, David M. Pennock, Gary William Flake, Robert Krovetz, Frans Coetzee, Eric J. Glover, Finn Årup Nielsen, Andries Kruger, C. Lee Giles	Persistence of Web References in Scientific Research.	Computer	2001	DBLP DOI BibTeX RDF
21	Pavel Berkhin, Jonathan D. Becher, Dee Jay Randall	Interactive path analysis of web site traffic.	KDD	2001	DBLP DOI BibTeX RDF
21	James M. Bieman, Vanessa Murdock 0001	Finding Code on the World Wibe Web: A Preliminary Investigation.	SCAM	2001	DBLP DOI BibTeX RDF	World Wide Web estimation, code on the World Wide Web, Design, source code analysis
21	Nirav H. Kapadia, José A. B. Fortes, Mark S. Lundstrom	The Purdue University network-computing hubs: running unmodified simulation tools via the WWW.	ACM Trans. Model. Comput. Simul.	2000	DBLP DOI BibTeX RDF	Internet computing, network-computing, web-based simulation
21	Songting Chen, Yanlei Diao, Hongjun Lu, Zengping Tian	Fact: A Learning Based Web Query Processing System.	SIGMOD Conference	2000	DBLP DOI BibTeX RDF
21	Tim Kindberg, John J. Barton, Jeff Morgan, Gene Becker, Debbie Caswell, Philippe Debaty, Gita Gopal, Marcos Frid, Venky Krishnan, Howard Morris, John Schettino, Bill Serra, Mirjana Spasojevic	People, places, things: Web presence for the real world.	WMCSA	2000	DBLP DOI BibTeX RDF	Web presence, portable client devices, HP Labs, Cooltown project, nomadic users, Internet, Internet, World Wide Web, mobile computing, wireless networks, wireless LAN, Web servers, information resources, ubiquitous system, URL, file servers, location-aware system
21	Tamer I. Ibrahim, Cheng-Zhong Xu 0001	Neural Nets based Predictive Prefetching to Tolerate WWW Latency.	ICDCS	2000	DBLP DOI BibTeX RDF
21	Wei-hsiu Ma, Yen-Jen Lee, David Hung-Chang Du, Mark McCahill	Video-Based Hypermedia for Education-on-Demand.	IEEE Multim.	1998	DBLP DOI BibTeX RDF	video-based hypermedia, QuickTime, Gopher, Internet, World Wide Web, distance education
21	Wataru Sunayama, Yuji Nomura, Yukio Ohsawa, Masahiko Yachida	Refining Search Expression by Discovering Hidden User's Interests.	Discovery Science	1998	DBLP DOI BibTeX RDF
19	Sanjukta Mohanty, Arup Abhinna Acharya, Tarek Gaber, Namita Panda, Esraa Eldesouky, Ibrahim A. Hameed	An Efficient Hybrid Feature Selection Technique Toward Prediction of Suspicious URLs in IoT Environment.	IEEE Access	2024	DBLP DOI BibTeX RDF
19	Boyang Yu, Fei Tang, Daji Ergu, Rui Zeng, Bo Ma, Fangyao Liu	Efficient Classification of Malicious URLs: M-BERT - A Modified BERT Variant for Enhanced Semantic Understanding.	IEEE Access	2024	DBLP DOI BibTeX RDF
19	Fayaz Ahmad Loan, Aasif Mohammad Khan, Syed Aasif Ahmad Andrabi, Sozia Rashid Sozia, Umer Yousuf Parray	Giving life to dead: role of WayBack Machine in recovery of dead URLs.	Data Technol. Appl.	2024	DBLP DOI BibTeX RDF
19	Bob Frankston	Forever URLs.	IEEE Consumer Electron. Mag.	2024	DBLP DOI BibTeX RDF