Search results for "purchasing"

Hits ?▲	Authors	Title	Venue	Year	Link	Author keywords
96	Mark J. R. Ebben, Luitzen de Boer, Corina E. PopSitar	Manufacturing supply chain applications 3: multi-agent simulation of purchasing activities in organizations.	WSC	2002	DBLP DOI BibTeX RDF
68	Se-Joon Hong, F. Javier Lerch	A laboratory study of consumers' preferences and purchasing behavior with regards to software components.	Data Base	2002	DBLP DOI BibTeX RDF	component objective features, consumer decision-making model, consumer preferences, consumer purchasing behavior, software component market
66	Bing-Yi Lin, Ping-Ju Wu, Chi-I Hsu	Evaluating Measurement Models for Web Purchasing Intention.	HCI (9)	2007	DBLP DOI BibTeX RDF
66	Ying Wang, Zhiyi Fang, Chao Zhang, Dan Zhang, Yingrui Zhang, Benshang Tong	CSCW-based JIT Purchasing Management.	CSCWD	2006	DBLP DOI BibTeX RDF
66	Lijuan Huang	Consumer's Purchasing Behavior Analysis Based on the Self-Organizing Feature Map Neural Network Algorithm in E-Supply Chain.	ICONIP (1)	2006	DBLP DOI BibTeX RDF	SOFM, neural network, behavior, consumer
66	Daniel Dajun Zeng, James C. Cox, Moshe Dror	Coordination of Purchasing and Bidding Activities across Markets.	HICSS	2004	DBLP DOI BibTeX RDF
58	Zhen Zhang, K. H. (Kane) Kim, Myeong-Ho Kang, Tianran Zhou, Byung-Ho Chung, Shin-Hyo Kim, Seok-Joon Lee	An E-Cash Based Implementation Model for Facilitating Anonymous Purchasing of Information Products.	ICISS	2009	DBLP DOI BibTeX RDF	payment gateway, Anonymous, encryption, mix, purchasing, e-cash, information product
56	Daniel Dajun Zeng, James C. Cox, Moshe Dror	Coordination of purchasing and bidding activities across posted offer and auction markets.	Inf. Syst. E Bus. Manag.	2007	DBLP DOI BibTeX RDF	Multiple markets, Fixed transaction costs, Equilibrium bidding, Online auctions
48	Zongfeng Zou, Tao Yu	Data Management in Group Purchasing System.	PROLAMAT	2006	DBLP DOI BibTeX RDF	Group purchasing, Price Comparison System, Data management
48	Scott Buffett, Bruce Spencer	Efficient Monte Carlo decision tree solution in dynamic purchasing environments.	ICEC	2003	DBLP DOI BibTeX RDF	bundle purchasing, expected utility theory, decision tree, Monte Carlo, decision analysis
46	Weiya Zhao, Xiutian Zheng	Return Forecasting and Risk Analysis of Purchasing New Issues in Chinese Primary Market Based on Simulation.	FSKD (4)	2008	DBLP DOI BibTeX RDF
42	Wilkey Wong, Ximena Uribe-Zarain, Roberta Golinkoff, Kelly Fisher, Kathy Hirsh-Pasek	Parents' views of the benefits claimed in educational toy advertising.	IDC	2008	DBLP DOI BibTeX RDF	parental perceptions, toy packaging, advertising, influence, purchasing, cognitive development, sensory
40	Yue-Shi Lee, Show-Jane Yen	Mining Web Transaction Patterns in an Electronic Commerce Environment.	APWeb/WAIM Workshops	2007	DBLP DOI BibTeX RDF
40	Guoming Lai 0001, Katia P. Sycara, Laurens G. Debo, Cuihong Li	An analysis on price matching policy.	ICEC	2006	DBLP DOI BibTeX RDF	post-sale, price matching, strategic consumer, win-win, pricing, retailing
40	Martin Hoefer 0001, Piotr Krysta	Geometric Network Design with Selfish Agents.	COCOON	2005	DBLP DOI BibTeX RDF
38	Jiang Hua	The Application of Game Theory in Enterprise' Transaction of Purchasing.	JCAI	2009	DBLP DOI BibTeX RDF	game theory, purchasing, dominant strategy, suppliers
38	Scott Buffett	Considering expected utility of future bidding options in bundle purchasing with multiple auctions.	ICEC	2004	DBLP DOI BibTeX RDF	bundle purchasing, multiple auctions, dynamic programming, markov decision process, decision analysis, expected utility
38	Dan Jong Kim 0001, Bongsoon Cho, H. Raghav Rao	Effects of consumer lifestyles on purchasing behavior on the Internet: a conceptual framework and empirical validation.	ICIS	2000	DBLP BibTeX RDF	consumer lifestyles, consumer purchasing behavior, perceived benefit, valance framework, Internet, conceptual framework, perceived risk
36	Pierre Hadaya, Jean Éthier	Online Purchasing of Simple Retail Goods: The Impact of e-Service Quality as Provided by Electronic Commerce Functionalities.	HICSS	2008	DBLP DOI BibTeX RDF
36	Lifen Yeh, Eric Min-Yang Wang, Sheue-Ling Hwang	A Study of Emotional and Rational Purchasing Behavior for Online Shopping.	HCI (15)	2007	DBLP DOI BibTeX RDF	Emotional decision, Web appeal, Purchase behavior, E-commerce
36	Azwina M. Yusof	An on-line purchasing and decision support system for distributed retail chain stores.	ICEC	2004	DBLP DOI BibTeX RDF	chain stores, e-commerce, distributed database, decision support system, retail
36	Yue-Shi Lee, Show-Jane Yen, Ghi-Hua Tu, Min-Chi Hsieh	Mining Traveling and Purchasing Behaviors of Customers in Electronic Commerce Environment.	EEE	2004	DBLP DOI BibTeX RDF
36	Runhe Huang, Takeshi Yamazaki, Jianhua Ma 0002	A Mobile Negotiation Agent Embedded Hybrid Online Purchasing System.	ICDCS Workshops	2004	DBLP DOI BibTeX RDF
36	Joanna L. Ho	A Field Study of Using Open Buy on the Internet (OBI) to Streamline the Purchasing Process.	WECWIS	1999	DBLP DOI BibTeX RDF
32	Frank Y. Shih, Yao-Chung Chang, Min-Chun Peng, Yu-Shan Lin	Cross layer design for RFID/EPC network.	Mobility Conference	2008	DBLP DOI BibTeX RDF	EPC network, RFID smart phone, intelligent mobile purchasing system, cross layer design
32	Rebecca Angeles	Business-to-business e-procurement corporate initiative: a descriptive empirical study.	ICEC	2006	DBLP DOI BibTeX RDF	business-to-business commerce, supply chain management, value chains, e-procurement, purchasing, interorganizational systems
32	Scott Buffett	A Markov Model for Inventory Level Optimization in Supply-Chain Management.	Canadian AI	2005	DBLP DOI BibTeX RDF	dynamic programming, supply-chain management, Markov decision process, purchasing
32	Alea M. Fairchild, Bruno de Vuyst	Coding Standards Benefiting Product and Service Information in E-commerce.	HICSS	2002	DBLP DOI BibTeX RDF	Internet, Electronic Commerce, Standards, Purchasing
32	Aileen Cater-Steel, Edmond P. Fitzgerald	Quality assurance certification: adoption by Australian software developers and its association with capability maturity.	APSEC	1997	DBLP DOI BibTeX RDF	software quality assurance certification, Australian software developers, capability maturity, government purchasing policies, QA certification, JAS-ANZ register, organisational characteristics, software quality, survey, CMM, questionnaire, Australia, Hong Kong, research project, Singapore
31	Oktay Karabag, Baris Tan	Purchasing, production, and sales strategies for a production system with limited capacity, fluctuating sales and purchasing prices.	IISE Trans.	2019	DBLP DOI BibTeX RDF
31	Yong Wang, Xiaofei Xu, Jun He 0012, Chao Chen, Ke Ren	Impact of Purchasing Power on User Rating Behavior and Purchasing Decision.	ICSI (2)	2018	DBLP DOI BibTeX RDF
31	Robbert J. G. Kusters, Johan Versendaal	Collaborative e-Purchasing for Hospitals: IT for Addressing Collaborative Purchasing Impediments.	Bled eConference	2011	DBLP BibTeX RDF
31	Javier González-Benito	Information technology investment and operational performance in purchasing: The mediating role of supply chain management practices and strategic integration of purchasing.	Ind. Manag. Data Syst.	2007	DBLP DOI BibTeX RDF
31	Eungab Kim, Kaphoon Lee, Suk-Ho Kang	Optimal purchasing policy in a two-component assembly system with different purchasing contracts for each component.	Math. Methods Oper. Res.	2006	DBLP DOI BibTeX RDF
31	David Hemsworth, Cristóbal Sánchez-Rodríguez, Bruce Bidgood	Determining the impact of quality management practices and purchasing-related information systems on purchasing performance: A structural model.	J. Enterp. Inf. Manag.	2005	DBLP DOI BibTeX RDF
30	Serge Egelman, Janice Y. Tsai, Lorrie Faith Cranor, Alessandro Acquisti	Timing is everything?: the effects of timing and placement of online privacy indicators.	CHI	2009	DBLP DOI BibTeX RDF	website indicators, privacy, timing, mental models, privacy policies, usable privacy and security
30	Yangming Zhang, Jiayin Qi, Huaying Shu, Jiantong Cao	Personalized product recommendation based on customer value hierarchy.	SMC	2007	DBLP DOI BibTeX RDF
30	Ha Jin Hwang	A Study to Apply Intelligent Agents for B2C Shopping Mall.	KES-AMSTA	2007	DBLP DOI BibTeX RDF
30	Levent V. Orman	Optimum design of electronic communities as economic entities.	Inf. Syst. Frontiers	2006	DBLP DOI BibTeX RDF	Economics of markets, Consumer surplus, Electronic business models, Electronic markets, Market design, Electronic communities
30	Hiroko Shoji, Koichi Hori	S-Conart: an interaction method that facilitates concept articulation in shopping online.	AI Soc.	2005	DBLP DOI BibTeX RDF	Concept articulation, Creative cognition, Interaction, Decision making, Online shopping
30	Linli He, Thomas R. Ioerger	Combining bundle search with buyer coalition formation in electronic markets: a distributed approach through explicit negotiation.	ICEC	2004	DBLP DOI BibTeX RDF	bundle search, coalition formation, automated negotiation
30	Ajit Kambil, Arnold Kamis, Marios Koufaris, Priscilla Ann Labarbera, Paul F. Nunes	Marketing in Electronic Commerce - Minitrack Introduction.	HICSS	2001	DBLP DOI BibTeX RDF
30	Mark B. Johnson	You cannot lead a horse to water: taking charge of microcomputer support.	SIGUCCS	1987	DBLP DOI BibTeX RDF
26	Shun Cai, Yunjie Xu, Jie Yu 0002	The effects of web site aesthetics and shopping task on consumer online purchasing behavior.	CHI Extended Abstracts	2008	DBLP DOI BibTeX RDF	classical aesthetics, expressive aesthetics, website aesthetics
26	Hak-Jin Kim, Wooju Kim, Jongmyong Kim	An Intelligent Shopping Agent for Optimal Purchasing Decision on the Semantic Web.	ISCIS	2006	DBLP DOI BibTeX RDF	Internet Shop-ping Agent, Semantic Web, Integer Programming, OWL, SWRL
26	Christopher N. Eichelberger, Mirsad Hadzikadic	Investigating Agent Strategies within a Complex Adaptive System of Purchasing Agents for Estimating Attribute Relevance.	IAT Workshops	2006	DBLP DOI BibTeX RDF
26	Rui Dai, Sridhar Narasimhan, Dongjun Wu	E-Sourcing: Buyer's Efficient Structure for Purchasing Preparation Process.	HICSS	2005	DBLP DOI BibTeX RDF
22	Yoshiteru Nakamori, Yukihiro Yamashita, Mina Ryoke	Knowledge Integration on Fresh Food Management.	KSEM	2007	DBLP DOI BibTeX RDF	fresh food management, i-System, managerial knowledge, KJ method, purchasing factors, Demand forecasting
22	Mark Beukers, Johan Versendaal, Ronald Batenburg, Sjaak Brinkkemper	The procurement alignment framework construction and application.	Wirtschaftsinf.	2006	DBLP DOI BibTeX RDF	IT/Business Alignment, Case Study Method, Procurement, Maturity, Purchasing
22	Nikolaus Müssigmann, Antonia Albani	Supplier network management: evaluating and rating of strategic supply networks.	SAC	2006	DBLP DOI BibTeX RDF	inter-organizational engineering, strategic purchasing, supplier network management, evaluation
22	Joseph Hughes	Compared to operation overlord, deploying and supporting laptops should be easy.	SIGUCCS	2006	DBLP DOI BibTeX RDF	purchasing laptops, supporting laptops, laptops
22	Mikkel Hippe Brun, Christian Lanng	Reducing barriers for e-business in SME's through an open service oriented infrastructure.	ICEC	2006	DBLP DOI BibTeX RDF	EdiFact, OIOXML, interoperability, integration, digital signatures, business process, e-business, PKI, WSDL, EDI, procurement, UDDI, eCommerce, purchasing, UBL, data interchange
22	Gordana Brouilette, Cindy Stewart	Benefits and strategies of implementing educational software site licenses.	SIGUCCS	2002	DBLP DOI BibTeX RDF	sales, site license, volume purchasing, educational, software, contract, research, students, agreements, administration, inventory, computer labs, faculty, staff
22	Jeff Leane	Work in Progress Report: Chemdex and the Business to Business Marketmaker Business Model.	WECWIS	1999	DBLP DOI BibTeX RDF	marketmaker, internet, e-commerce, procurement, b2b, business-to-business, purchasing, marketplace, biotechnology
20	Kai Reimers, Xunhua Guo, Guoqing Chen	Do IT managers learn how to control spending on new information technology?: a study of IT budget growth in Chinese companies.	Data Base	2009	DBLP DOI BibTeX RDF	Chinese companies, IT spending, stages hypothesis, organizational learning, diffusion of innovations, IT management
20	Khaled M. Elbassioni, Rajiv Raman 0001, Saurabh Ray, René Sitters	On Profit-Maximizing Pricing for the Highway and Tollbooth Problems.	SAGT	2009	DBLP DOI BibTeX RDF
20	Jarmanjit Singh, Qing Shi, Harpreet Sandhu, Benjamin C. M. Fung	Anonymizing location-based RFID data.	C3S2E	2009	DBLP DOI BibTeX RDF	appendage, dummy record, suppression, privacy, anonymity
20	Takanobu Nakahara, Hiroyuki Morita	Recommender System for Music CDs Using a Graph Partitioning Method.	KES (2)	2009	DBLP DOI BibTeX RDF	Data mining, Recommender system, Collaborative filtering, Graph-partitioning, Binary Data
20	Chen Pang, Xiaofen Ji	An Empirical Study on Predicting User Purchase Intention on the Creative Product: A Case of Apparel.	ISECS	2008	DBLP DOI BibTeX RDF	online behavior, creative products, consumer characteristics, Technology Acceptance Model
20	Katsutoshi Yada	Character String Analysis and Customer Path in Stream Data.	ICDM Workshops	2008	DBLP DOI BibTeX RDF
20	Melissa de Andrade Souza, Jairo S. Dornelas	The role of perceived risks among heavy users in e-commerce: a research in Pernambuco, Brazil.	EATIS	2008	DBLP DOI BibTeX RDF	internet knowledge, internet literacy, e-commerce, consumer behavior, perceived risks
20	David Kempe 0001, Adam Meyerson, Nainesh Solanki, Ramnath K. Chellappa	Pricing of partially compatible products.	EC	2007	DBLP DOI BibTeX RDF	duopoly, graph, pricing, compatibility, cut
20	Young Chan Choe, Deok-Ran Hwang, Miyoung Kim, Junghoon Moon	Product Heterogeneity: Moderating Effect on Online Consumer Behavior.	HICSS	2007	DBLP DOI BibTeX RDF
20	Timothy Urness	Teaching computer organization/architecture by building a computer.	WCAE	2007	DBLP DOI BibTeX RDF	computer science education, computer architecture, hardware
20	György Dósa, Yong He	Scheduling with machine cost and rejection.	J. Comb. Optim.	2006	DBLP DOI BibTeX RDF	Machine cost, Rejection penalty, Scheduling, Online algorithm
20	Dongjoo Lee, Taehee Lee 0001, Suekyung Lee, Ok-Ran Jeong, Hyeonsang Eom, Sang-goo Lee	BestChoice: A Decision Support System for Supplier Selection in e-Marketplaces.	DEECS	2006	DBLP DOI BibTeX RDF
20	Paavo Kotinurmi, Tomas Vitvar, Armin Haller, Ray Richardson, Aidan Boran	Semantic Web Services Enabled B2B Integration.	DEECS	2006	DBLP DOI BibTeX RDF
20	Marc Fetscherin	Economics of online music and consumer behavior.	ICEC	2006	DBLP DOI BibTeX RDF	online music, digital rights management, consumer behavior
20	Christopher Kiekintveld, Jason Miller, Patrick R. Jordan, Michael P. Wellman	Controlling a supply chain agent using value-based decomposition.	EC	2006	DBLP DOI BibTeX RDF	scheduling, optimization, coordination, decomposition, supply chain management, trading agents
20	Sven Döring, Stefan Fischer 0003, Werner Kießling, Timotheus Preisinger	Optimizing the Catalog Search Process for E-Procurement Platforms.	DEEC	2005	DBLP DOI BibTeX RDF
20	Tommaso Federici	An Integrated Approach in Healthcare e-Procurement: The Case-Study of the ASL of Viterbo.	TCGOV	2005	DBLP DOI BibTeX RDF
20	Jian-Qiang Hu, Pirooz Vakili, Lei Huang	Capacity and Production Managment in a Single Product Manufacturing System.	Ann. Oper. Res.	2004	DBLP DOI BibTeX RDF	hedging policy, flow control, production systems
20	Show-Jane Yen, Yue-Shi Lee	Mining Sequential Patterns with Item Constraints.	DaWaK	2004	DBLP DOI BibTeX RDF
20	Gyoo Gun Lim, Soo-Hyun Park, Jinhwa Kim	Modeling of the b-Cart Based Agent System in B2B EC.	AsiaSim	2004	DBLP DOI BibTeX RDF
20	Arnold Kamis, Michael J. Davern	Personalizing to Product Category Knowledge: Exploring the Mediating Effect of Shopping Tools on Decision Confidence.	HICSS	2004	DBLP DOI BibTeX RDF
20	Maximilian Teltzrow, Oliver Günther 0001, Carsten Pohle	Analyzing consumer behavior at retailers with hybrid distribution channels: a trust perspective.	ICEC	2003	DBLP DOI BibTeX RDF	B2C eCommerce, new business models, trust, consumer behavior
20	Kenton O'Hara, Mark J. Perry	User Centred Opportunities for Supporting Consumer Behaviour Through Handheld and Ubiquitous Computing.	HICSS	2003	DBLP DOI BibTeX RDF
20	Jakka Sairamesh, SweeFen Goh, Ioana Stanoi, Chung-Sheng Li, Sriram Padmanabhan	Self-managing, disconnected processes and mechanisms for mobile e-business.	Workshop Mobile Commerce	2002	DBLP DOI BibTeX RDF	context-driven computing, disconnected computing, mobile e-business, mobile computing, workflow, self-managing systems
20	Munindar P. Singh	Being Interactive: An Evolutionary Look at E-Commerce.	IEEE Internet Comput.	2001	DBLP DOI BibTeX RDF
20	Hsiu-Yuan Tsao, Koong H.-C. Lin	A Two-Level Approach to Establishing a Marketing Strategy in the Electronic Marketplace.	HICSS	2001	DBLP DOI BibTeX RDF
20	Errin W. Fulp, Douglas S. Reeves	QoS Rewards and Risks: A Multi-market Approach to Resource Allocation.	NETWORKING	2000	DBLP DOI BibTeX RDF
20	Ching-Huang Yun, Ming-Syan Chen	Using Pattern-Join and Purchase-Combination for Mining Web Transaction Patterns in an Electronic Commerce Environment.	COMPSAC	2000	DBLP DOI BibTeX RDF
20	Arrianto Mukti Wibowo, Kwok-Yan Lam, Gary S. H. Tan	Loyalty Program Scheme for Anonymous Payment System.	EC-Web	2000	DBLP DOI BibTeX RDF
20	Hong Heather Yu, Alex Gelman	Digital Multimedia Content Management for Networked Information Access: Issues and Discussion.	WECWIS	1999	DBLP DOI BibTeX RDF	Electronic multimedia content access, electronic media distribution, information access through Internet, digital multimedia content management, digital multimedia information access, security layer, hierarchical networked multimedia database
20	Artur Romão, Miguel Mira da Silva	An Agent-Based Secure Internet Payment System for Mobile Computing.	Trends in Distributed Systems for Electronic Commerce	1998	DBLP DOI BibTeX RDF
16	Zakaria Sakyoud, Abdessadek Aaroud, Khalid Akodadi	Optimization of purchasing business process in Moroccan public universities based on COBIT and artificial intelligence techniques.	Kybernetes	2024	DBLP DOI BibTeX RDF
16	Xiuhong Niu, Yongming Song, Hongli Zhu	Data-Driven Decision Aids for Purchasing Battery Electric Vehicles Based on PROMETHEE-II Methodology.	IEEE Access	2024	DBLP DOI BibTeX RDF
16	Matilde Aires, Álvaro Dias 0001, Leandro Ferreira Pereira	How visual merchandising influences Generation Z purchasing behaviour in supermarkets.	Int. J. Arts Technol.	2024	DBLP DOI BibTeX RDF
16	Serhan Demirci, Chia-Ju Ling, Dai-Rong Lee, Chien-Wen Chen	How Personality Traits Affect Customer Empathy Expression of Social Media Ads and Purchasing Intention: A Psychological Perspective.	J. Theor. Appl. Electron. Commer. Res.	2024	DBLP DOI BibTeX RDF
16	Jan Martin Spreitzenbarth, Christoph Bode, Heiner Stuckenschmidt	Designing an AI purchasing requisition bundling generator.	Comput. Ind.	2024	DBLP DOI BibTeX RDF
16	Ying Chen 0010, Jie Zhao, Jintao Hu, Shaohua Wan 0001, Jiwei Huang	Distributed Task Offloading and Resource Purchasing in NOMA-Enabled Mobile Edge Computing: Hierarchical Game Theoretical Approaches.	ACM Trans. Embed. Comput. Syst.	2024	DBLP DOI BibTeX RDF
16	Latifah Almuqren, Nuha Alruwais, Asma Alhashmi, Ibrahim R. Alzahrani, Nahla Salih, Mohammed Assiri, K. Shankar 0002	WSN-Assisted Consumer Purchasing Power Prediction via Barracuda Swarm Optimization-Driven Deep Learning for E-Commerce Systems.	IEEE Trans. Consumer Electron.	2024	DBLP DOI BibTeX RDF
16	Piotr Skalski, David Sutton, Stuart Burrell, Iker Perez, Jason Wong	Towards a Foundation Purchasing Model: Pretrained Generative Autoregression on Transaction Sequences.	CoRR	2024	DBLP DOI BibTeX RDF
16	Yang Zhao	Consumer purchasing intention and marketing data mining model in the digital economy.	Int. J. Data Min. Bioinform.	2024	DBLP DOI BibTeX RDF
16	Eyob Minbale, Berihun Bizuneh, Wendosen Seife, Alene Eyasu, Tinsaye Asfaw, Shalemu Sharew	Ethiopian Consumer's Behavior towards Purchasing Locally Produced Apparel Products: An Extended Model of the Theory of Planned Behavior.	Complex.	2024	DBLP DOI BibTeX RDF
16	Grace Chmielinski, Sarah Bratt	Plant-Based Predictions: An Exploratory Predictive Analysis of Purchasing Behavior of Meat-Alternatives by U.S. Consumers (2020).	iConference (1)	2024	DBLP DOI BibTeX RDF
16	Jost Adler	Comment on "Modeling Purchasing Behavior with Sudden 'Death': A Flexible Customer Lifetime Model".	Manag. Sci.	2023	DBLP DOI BibTeX RDF
16	Geoffrey Fisher	Measuring the Factors Influencing Purchasing Decisions: Evidence From Cursor Tracking and Cognitive Modeling.	Manag. Sci.	2023	DBLP DOI BibTeX RDF
16	Jianghua Zhang, Felix T. S. Chan, Xinsheng Xu	Data-driven analysis on optimal purchasing decisions in combined procurement.	Int. J. Prod. Res.	2023	DBLP DOI BibTeX RDF
16	Sadik Kucuksari, Dragan Pamucar, Muhammet Deveci, Nuh Erdogan, Dursun Delen	A new rough ordinal priority-based decision support system for purchasing electric vehicles.	Inf. Sci.	2023	DBLP DOI BibTeX RDF