Search results for "group interaction"

Hits ?▲	Authors	Title	Venue	Year	Link	Author keywords
3	Gerry Stahl	For a science of group interaction.	GROUP	2009	DBLP DOI BibTeX RDF	group cognition, CSCW, CSCL, group interaction
3	Jianhua Zhao	A Sociogram Analysis on Group Interaction in an Online Discussion Forum.	ICWL	2008	DBLP DOI BibTeX RDF	a Sociogram Analysis, Group Interaction, Online Learning Environment, Online Discussion Forum
3	Pierre A. Balthazard, Richard E. Potter, John Warren	Expertise, extraversion and group interaction styles as performance indicators in virtual teams: how do perceptions of IT's performance get formed?	DATA BASE	2004	DBLP DOI BibTeX RDF	big five personality model, contextual performance, extraversion, group interaction styles, virtual teams, expertise, task performance
3	Alois Ferscha, Clemens Holzmann, Stefan Oppl	Context awareness for group interaction support.	Mobility Management & Wireless Access Protocols	2004	DBLP DOI BibTeX RDF	context awareness, sensor fusion, group interaction, location sensing
3	Tom L. Roberts, Paul H. Cheney, Paul D. Sweeney	Group Interaction Constructs for Hands-on LAN Projects: An Initial Investigation.	HICSS	2002	DBLP DOI BibTeX RDF	local area network (LAN) and group work, group interaction
2	Eyal Dim, Tsvi Kuflik	Social signal processing: detecting small group interaction in leisure activity.	IUI	2010	DBLP DOI BibTeX RDF	interrupt management, social signal processing, ubiquitous computing, group modeling
2	Peng Dai, Huijun Di, Ligeng Dong, Linmi Tao, Guangyou Xu	Group Interaction Analysis in Dynamic Context.	IEEE Transactions on Systems, Man, and Cybernetics, Part B	2008	DBLP DOI BibTeX RDF
2	Ron Wakkary, Marek Hatala, Ying Jiang, Milena Droumeva, Malahat Hosseini	Making sense of group interaction in an ambient intelligent environment for physical play.	Tangible and Embedded Interaction	2008	DBLP DOI BibTeX RDF	games, groups, embodiment, ambient display, play, responsive environment
2	Hyun Sang Cho, Kyoung Shin Park, Minsoo Hahn	Tea Table Mediator: A Multimodal Ambient Display on the Table Exploiting Five Senses Convergence.	ICEC	2007	DBLP DOI BibTeX RDF	Sense Convergence, Small Group Interaction, Tabletop Display
2	Meletis Margaritis, Nikolaos M. Avouris, Georgios Kahrimanis	On Supporting Users' Reflection During Small Groups Synchronous Collaboration.	CRIWG	2006	DBLP DOI BibTeX RDF	collaborative problem solving, small group interaction, computer supported collaborative learning, interaction analysis, synchronous collaboration
2	Anders I. Mørch, Silje Jondahl, Jan A. Dolonen	Supporting Conceptual Awareness with Pedagogical Agents.	Information Systems Frontiers	2005	DBLP DOI BibTeX RDF	generalized other, awareness, virtual learning environments, pedagogical agents, group interaction
2	Mark Feldmeier, Joseph A. Paradiso	Giveaway wireless sensors for large-group interaction.	CHI Extended Abstracts	2004	DBLP DOI BibTeX RDF	featherweight wireless sensor, large group interaction, low-power wireless sensor, musical interface, motion sensor
2	Raúl Cid	Group Interaction and VR Storytelling in Museums.	International Conference on Virtual Storytelling	2003	DBLP DOI BibTeX RDF
2	Michael Hoch, Daniel Schwabe	Group Interaction in a Surround Screen Environment. (PDF / PS)	CA	1999	DBLP DOI BibTeX RDF
2	Karin Schmidt, Peter Manhart, Johannes Bumiller	A Generic System for Web-Based Group Interaction. (PDF / PS)	HICSS	1998	DBLP DOI BibTeX RDF
2	Pedro Antunes	A system for supporting and managing same-time/different-place group interactions.	AVI	1998	DBLP DOI BibTeX RDF	CSCW, group interaction
2	Pedro Antunes, Nuno Guimarães, Javier Segovia, Jesús Cardeñosa	Beyond formal processes: augmenting workflow with group interaction techniques.	COOCS	1995	DBLP DOI BibTeX RDF
2	Steve M. Easterbrook	Coordination breakdowns: why groupware is so difficult to design.	HICSS	1995	DBLP DOI BibTeX RDF	coordination breakdowns, group interaction complexity, software support tool requirements, analysis techniques, collaboration, groupware, human factors, conflict, group support systems, user adaptability, organisational change, groupware design, shared understanding, interaction mechanisms
2	Rosalie J. Ocker, Starr Roxanne Hiltz, Murray Turoff, Jerry Fjermestad	Computer support for distributed asynchronous software design teams: experimental results on creativity and quality.	HICSS	1995	DBLP DOI BibTeX RDF	distributed asynchronous software design teams, distributed asynchronous computer conferencing, automated post office, course assignment, formal specification, groupware, creativity, quality, systems analysis, software design, computer science, software development management, teleconferencing, software specifications, business, group interaction, graduate students, face-to-face meetings
2	Karim Hussein, Feniosky Peña-Mora, Ram D. Sriram	CAIRO: a system for facilitating communication in a distributed collaborative engineering environment. (PDF / PS)	WETICE	1995	DBLP DOI BibTeX RDF	CAIRO, distributed collaborative engineering environment, distributed conference, social communications theory, conference control mechanism, agent synchronization, effective structuring, groupware, teleconferencing, group interaction, media synchronization, conference management
1	Joël Chadoeuf, G. Certain, E. Bellier, A. Bar-Hen, P. Couteron, P. Monestiez, V. Bretagnolle	Estimating inter-group interaction radius for point processes with nested spatial structures.	Computational Statistics & Data Analysis	2011	DBLP DOI BibTeX RDF
1	Seongtaek Lim, Sang Yun Cha, Chala Park, Inseong Lee, Jinwoo Kim	Idioculture in crowd computing: A focus on group interaction in an event-driven social media system.	Int. J. Hum.-Comput. Stud.	2011	DBLP DOI BibTeX RDF
1	Rene Kaiser, Claudia Wagner, Martin Hoeffernig, Harald Mayer	The Interaction Ontology Model - Supporting the Virtual Director Orchestrating Real-Time Group Interaction.	MMM	2011	DBLP DOI BibTeX RDF
1	Johanna Renny Octavia, Anastasiia Beznosyk, Karin Coninx, Peter Quax, Kris Luyten	User Modeling Approaches towards Adaptation of Users' Roles to Improve Group Interaction in Collaborative 3D Games.	HCI	2011	DBLP DOI BibTeX RDF
1	Gokul Chittaranjan, Oya Aran, Daniel Gatica-Perez	Exploiting observers' judgements for nonverbal group interaction analysis.	FG	2011	DBLP DOI BibTeX RDF
1	Nathan Kirchner, Alen Alempijevic, Gamini Dissanayake	Nonverbal robot-group interaction using an imitated gaze cue.	HRI	2011	DBLP DOI BibTeX RDF
1	N. Sadat Shami, Thomas Erickson, Wendy A. Kellogg	Common Ground and Small Group Interaction in Large Virtual World Gatherings.	ECSCW	2011	DBLP BibTeX RDF
1	Johanna Bluemink, Raija Hämäläinen, Tony Manninen, Sanna Järvelä	Group-level analysis on multiplayer game collaboration: how do the individuals shape the group interaction?	Interactive Learning Environments	2010	DBLP DOI BibTeX RDF
1	Pilar González-Navarro, Virginia Orengo, Ana Zornoza, Pilar Ripoll, José M. Peiró	Group interaction styles in a virtual context: The effects on group outcomes.	Computers in Human Behavior	2010	DBLP DOI BibTeX RDF
1	Andrew J. Scholand, Yla R. Tausczik, James W. Pennebaker	Assessing Group Interaction with Social Language Network Analysis.	SBP	2010	DBLP DOI BibTeX RDF
1	Dinesh Babu Jayagopi, Taemie Kim, Alex Pentland, Daniel Gatica-Perez	Recognizing conversational context in group interaction using privacy-sensitive mobile sensors.	MUM	2010	DBLP DOI BibTeX RDF
1	Surya Pratap Singh, Ramalingam Anantharaj, Tamal Banerjee	UNIFAC Group Interaction Prediction for Ionic Liquid-Thiophene Based Systems Using Genetic Algorithm.	SEAL	2010	DBLP DOI BibTeX RDF
1	Andreas Schmeil, Martin J. Eppler	Knowledge Sharing and Collaborative Learning in Second Life: A Classification of Virtual 3D Group Interaction Scripts.	J. UCS	2009	DBLP BibTeX RDF
1	Youngho Rhee, Juyeon Lee	On Modeling - A model of mobile community: designing user interfaces to support group interaction.	Interactions	2009	DBLP DOI BibTeX RDF
1	Peng Dai, Huijun Di, Ligeng Dong, Linmi Tao, Guangyou Xu	Group Interaction Analysis in Dynamic Context.	IEEE Transactions on Systems, Man, and Cybernetics, Part B	2009	DBLP DOI BibTeX RDF
1	Andreas Schmeil, Martin J. Eppler	Formalizing and Promoting Collaboration in 3D Virtual Environments - A Blueprint for the Creation of Group Interaction Patterns.	FaVE	2009	DBLP DOI BibTeX RDF
1	Hironori Egi, Hiroshi Shigeno, Ken-ichi Okada	Grasping contextual awareness inside aworkspace at the entrance to support group interaction.	ICITST	2009	DBLP DOI BibTeX RDF
1	Petr Slovák, Pavel Troubil, Petr Holub	GColl: A Flexible Videoconferencing Environment for Group-to-Group Interaction.	INTERACT	2009	DBLP DOI BibTeX RDF	Mutual Gaze, Partial Gaze Awareness, Presence Disparity, CMC, Videoconferencing, Gaze Awareness, Mixed Presence
1	Rachid Anane, Steven Marrocco, Behzad Bordbar	Trusted P2P Group Interaction.	CSA	2009	DBLP DOI BibTeX RDF
1	Daphna Shwarts-Asher, Niv Ahituv, Dalia Etzion	Computer-Mediated Group Interaction Processes.	CISIS	2009	DBLP DOI BibTeX RDF
1	Bruno Lepri, Nadia Mana, Alessandro Cappelletti, Fabio Pianesi	Automatic prediction of individual performance from "thin slices" of social behavior.	ACM Multimedia	2009	DBLP DOI BibTeX RDF	small group interaction, support vector machines, performance prediction, intelligent environments
1	Ron Wakkary, Marek Hatala, Kevin Muise, Karen Tanenbaum, Greg Corness, Bardia Mohabbati, Jim Budd	Kurio: a museum guide for families.	Tangible and Embedded Interaction	2009	DBLP DOI BibTeX RDF	learning, tangible user interface, hybrid system, social interaction, group, museums, families, group interaction
1	Béatrice S. Hasler, Thierry Buecheler, Rolf Pfeifer	Collaborative Work in 3D Virtual Environments: A Research Agenda and Operational Framework.	HCI	2009	DBLP DOI BibTeX RDF	group interaction processes, behavioral tracking, 3D collaborative virtual environments, Global virtual teams
1	Cecily Morrison, Alan F. Blackwell	Hospital user research using new media arts.	BCS HCI	2009	DBLP DOI BibTeX RDF	mobile devices, new media arts, intensive care
1	Reto Grob, Michael Kuhn 0002, Roger Wattenhofer, Martin Wirz	Cluestr: mobile social networking for enhanced group communication.	GROUP	2009	DBLP DOI BibTeX RDF	group initialization, clustering, HCI, social network, mobile device
1	Dinesh Babu Jayagopi, Daniel Gatica-Perez	Discovering group nonverbal conversational patterns with topics.	ICMI	2009	DBLP DOI BibTeX RDF	characterizing groups, nonverbal cues, meetings
1	Dilhan Perera, Judy Kay, Irena Koprinska, Kalina Yacef, Osmar R. Zaïane	Clustering and Sequential Pattern Mining of Online Collaborative Learning Data.	IEEE Trans. Knowl. Data Eng.	2009	DBLP DOI BibTeX RDF
1	Dirk Veiel, Jörg M. Haake, Stephan Lukosch	Extending a Shared Workspace Environment with Context-Based Adaptations.	CRIWG	2009	DBLP DOI BibTeX RDF	group context, adaptation, Shared workspaces
1	Jill Jameson	Distributed Leadership, Trust and Online Communities.	HCI	2009	DBLP DOI BibTeX RDF	Distributed leadership, e-learning, case study, pattern-matching, online communities, visibility, ambiguity, paradox, invisibility
1	Laura Maruster, Niels R. Faber, Rob J. F. van Haren	Personalization for Specific Users: Designing Decision Support Systems to Support Stimulating Learning Environments.	HCI	2009	DBLP DOI BibTeX RDF
1	Joseph P. Wherton, David Prendergast	The Building Bridges Project: Involving Older Adults in the Design of a Communication Technology to Support Peer-to-Peer Social Engagement.	USAB	2009	DBLP DOI BibTeX RDF	Loneliness, User-centered design, Voice over Internet Protocol (VoIP), Social isolation
1	Howard Swann	A mathematical model for retrospective impression formation of small group interaction.	Mathematical Social Sciences	2008	DBLP DOI BibTeX RDF
1	Cecily Morrison, Alan F. Blackwell	Co-located group interaction design.	CHI Extended Abstracts	2008	DBLP DOI BibTeX RDF	clinical information, f-formation, distributed cognition, choreography, ethnomethodology
1	Fabio Pianesi, Nadia Mana, Alessandro Cappelletti, Bruno Lepri, Massimo Zancanaro	Multimodal recognition of personality traits in social interactions.	ICMI	2008	DBLP DOI BibTeX RDF	support vector machines, intelligent environments, group interaction, personality modeling
1	Peng Dai, Guangyou Xu	Context-aware computing for assistive meeting system.	PETRA	2008	DBLP DOI BibTeX RDF	assistive meeting system, dynamic context model, group meeting analysis, context-aware computing
1	Imad Samarah, Souren Paul, Suresh Tadisina	Knowledge Conversion in GSS-Aided Virtual Teams: An Empirical Study.	HICSS	2008	DBLP DOI BibTeX RDF
1	Connie White, Linda Plotnick, Ronja Addams-Moring, Murray Turoff, Starr Roxanne Hiltz	Leveraging a Wiki to EnhanceVirtual Collaboration in the Emergency Domain.	HICSS	2008	DBLP DOI BibTeX RDF
1	Haiming Wang, Dajie Jiang	Performance Comparison of Control-Less Scheduling Policies for VoIP in LTE UL.	WCNC	2008	DBLP DOI BibTeX RDF
1	Shaolong Li, Changjia Chen, Lei Li	Prevent In-Game Cheat in Network Games.	WKDD	2008	DBLP DOI BibTeX RDF
1	Darleen M. DeRosa, Carter L. Smith, Donald A. Hantula	The medium matters: Mining the long-promised merit of group interaction in creative idea generation tasks in a meta-analysis of the electronic group brainstorming literature.	Computers in Human Behavior	2007	DBLP DOI BibTeX RDF
1	Sanjay Tripathi	Group interaction with smart phones at work place.	Mobile HCI	2007	DBLP DOI BibTeX RDF	context-dependent systems, mobile intranet, mobility and work environments, user experience, social computing, universal usability, mobile HCI
1	Wen Dong, Bruno Lepri, Alessandro Cappelletti, Alex Pentland, Fabio Pianesi, Massimo Zancanaro	Using the influence model to recognize functional roles in meetings.	ICMI	2007	DBLP DOI BibTeX RDF	support vector machines, intelligent environments, group interaction
1	Misook Sohn, Jeun Woo Lee	UP health: ubiquitously persuasive health promotion with an instant messaging system.	CHI Extended Abstracts	2007	DBLP DOI BibTeX RDF	health promotion, motivation, social interaction, persuasive technology, instant messaging (IM)
1	Tadeusz Stach, Carl Gutwin, David Pinelle, Pourang Irani	Improving recognition and characterization in groupware with rich embodiments.	CHI	2007	DBLP DOI BibTeX RDF	rich embodiment, avatars, embodiment, telepointers
1	Yide Shen	Transactive memory system development in virtual teams: the potential role of shared identity and shared context.	CPR	2007	DBLP DOI BibTeX RDF	shared identity, transactive memory system, virtual team, shared context
1	Samir Otmane, Nassima Ouramdane-Djerrah, Malik Mallem	Towards a Collaborative 3D Interaction Model for Cooperative Design in Virtual Environments.	CSCWD	2007	DBLP DOI BibTeX RDF
1	Zhimin Yang, Wei Tang, Zengguang Zhang	P2P Cooperation based on Strong Migration in CSCW.	CSCWD	2007	DBLP DOI BibTeX RDF
1	Pasi Mattila, Jukka Miettunen, Tony Manninen	An approach to a virtual learning environment through a game.	DIGITEL	2007	DBLP DOI BibTeX RDF
1	Tony Bergstrom, Karrie Karahalios	Conversation Clock: Visualizing audio patterns in co-located groups.	HICSS	2007	DBLP DOI BibTeX RDF
1	Dongsong Zhang, Doug Vogel, Paul Benjamin Lowry	Minitack Introduction: Cross-cultural Issues in Collaboration Technology.	HICSS	2007	DBLP DOI BibTeX RDF
1	Nassima Ouramdane-Djerrah, Samir Otmane, Malik Mallem	A New Model of Collaborative 3D Interaction in Shared Virtual Environment.	HCI	2007	DBLP DOI BibTeX RDF	virtual reality, collaborative virtual environment, 3D interaction, collaborative interaction
1	Sangho Park, Mohan M. Trivedi	Multi-person interaction and activity analysis: a synergistic track- and body-level analysis framework.	Mach. Vis. Appl.	2007	DBLP DOI BibTeX RDF	Two-level framework, Event hierarchy, Video surveillance, Context switching, Personal space, Activity analysis
1	Márcio G. P. Rosa, Marcos R. S. Borges, Flávia Maria Santoro	Evaluation of Contextual Information Influence on Group Interaction.	CSCWD (Selected Papers)	2006	DBLP DOI BibTeX RDF
1	Paul M. Aoki, Margaret H. Szymanski, Luke D. Plurkowski, James D. Thornton, Allison Woodruff, Weilie Yi	Where's the "party" in "multi-party"?: analyzing the structure of small-group sociable talk.	CSCW	2006	DBLP DOI BibTeX RDF	small group interaction, sociable talk, conversation analysis
1	Massimo Zancanaro, Bruno Lepri, Fabio Pianesi	Automatic detection of group functional roles in face to face interactions.	ICMI	2006	DBLP DOI BibTeX RDF	support vector machines, intelligent environments, group interaction
1	Kris Luyten, Kristof Thys, Steven Huypens, Karin Coninx	Telebuddies: social stitching with interactive television.	CHI Extended Abstracts	2006	DBLP DOI BibTeX RDF	cooperative user interfaces, semantic web, interactive television, common ground
1	Brian M. Tomaszewski, Alan M. MacEachren, Scott Pezanowski, Xiaoyan Liu, Ian Turton	Supporting humanitarian relief logistics operations through online geocollaborative knowledge management.	DG.O	2006	DBLP DOI BibTeX RDF	asynchronous group work, dynamic web map services (WMS)/web feature services (WFS) integration, humanitarian relief, open source GIS, concept maps, logistics, web portal, geocollaboration
1	Mathew Laibowitz, Jonathan Gips, Ryan Aylward, Alex Pentland, Joseph A. Paradiso	A sensor network for social dynamics.	IPSN	2006	DBLP DOI BibTeX RDF	behavior measurement, wearable sensors, active badge
1	Zixiu Guo, Tim Turner, Felix B. Tan	The Effect of Normative Social Influence and Cultural Diversity on Group Interactions.	HICSS	2006	DBLP DOI BibTeX RDF
1	Tom L. Roberts, Paul H. Cheney, Paul D. Sweeney, Ross T. Hightower	The Effects of Information Technology Project Complexity on Group Interaction.	J. of Management Information Systems	2005	DBLP BibTeX RDF
1	Rebecca A. Bates, Patrick Menning, Elizabeth Willingham, Chad Kuyper	Meeting acts: a labeling system for group interaction in meetings.	INTERSPEECH	2005	DBLP BibTeX RDF
1	Jun Zheng, Xiang Yuan, Yam San Chee	Designing multiparty interaction support in Elva, an embodied tour guide.	AAMAS	2005	DBLP DOI BibTeX RDF	virtual art gallery, virtual reality, virtual environments, embodied conversational agent, speech act, multi-user environment
1	Diane Maloney-Krichmar, Jenny Preece	A multilevel analysis of sociability, usability, and community dynamics in an online health community.	ACM Trans. Comput.-Hum. Interact.	2005	DBLP DOI BibTeX RDF	electronic support groups, online group dynamics, online social support, patient support community, self-help via the Internet, usability, Online community, health, sociability
1	Timothy J. Ellis, William Hafner	Peer Evaluations of Collaborative Learning Experiences Conveyed Through an Asynchronous Learning Network.	HICSS	2005	DBLP DOI BibTeX RDF
1	Kent Marett, Joey F. George	Group Deception in Computer-Supported Environments.	HICSS	2005	DBLP DOI BibTeX RDF
1	Matt-Mouley Bouamrane, Saturnino Luz, Masood Masoodian, David King	Supporting Remote Collaboration Through Structured Activity Logging.	GCC	2005	DBLP DOI BibTeX RDF
1	Olga A. Kulyk, Jimmy Wang, Jacques M. B. Terken	Real-Time Feedback on Nonverbal Behaviour to Enhance Social Dynamics in Small Group Meetings.	MLMI	2005	DBLP DOI BibTeX RDF
1	Thomas Erickson	Inhabited Models: Supporting Coherent Behavior in Online Systems.	User Modeling	2005	DBLP DOI BibTeX RDF
1	Ruediger Oehlmann	Externalizing Social Views in Collaborative Chance Discovery Facilitates Scenario Emergence.	WSTST	2005	DBLP DOI BibTeX RDF
1	Bradley A. Goodman, Frank Linton, Robert Gaimari, Janet Hitzeman, Helen Ross, Guido Zarrella	Using Dialogue Features to Predict Trouble During Collaborative Learning.	User Model. User-Adapt. Interact.	2005	DBLP DOI BibTeX RDF	training, intelligent agent, collaborative learning, distance learning, intelligent tutoring systems, student modeling, group modeling, dialogue modeling
1	Sangwoong Hwang, Hyunchul Park 0003, Chansuk Yang, Manjai Lee	Harmonics Table: Audiovisual Expression of Group Interaction on a Sensing Table.	ICEC	2004	DBLP DOI BibTeX RDF
1	Pierre A. Balthazard, David Waldman, Jane Howell, Leanne Atwater	Shared Leadership and Group Interaction Styles in Problem-Solving Virtual Teams.	HICSS	2004	DBLP DOI BibTeX RDF
1	Yi-Chan Deng, Ming-Zhang Do, Li-Jie Chang, Tak-Wai Chan	PuzzleView: Enhanced Workspace Displaying for Group Interaction with Tablet PCs.	WMTE	2004	DBLP DOI BibTeX RDF
1	Christopher Drackett, Victoria Fong, Judy Ko, Saki Tanaka, Salma Ting	Global garden: a vision of the universal scoring device.	CHI Extended Abstracts	2004	DBLP DOI BibTeX RDF	individual expression, input/output integration, non-numerical, scoring device, connect, wearable, intuitive interaction
1	Starr Roxanne Hiltz, Maryam Alavi, Donna Dufner	Asynchronous learning networks: priorities for software development.	CHI Extended Abstracts	2004	DBLP DOI BibTeX RDF	e-learning, computer-mediated communication, online learning, ALN
1	Dennis C. Neale, John M. Carroll, Mary Beth Rosson	Evaluating computer-supported cooperative work: models and frameworks.	CSCW	2004	DBLP DOI BibTeX RDF	CSCW evaluation, models, awareness, common ground
1	David Bargeron, Jonathan Grudin	As Users Grow More Savvy: Experiences with an Asynchronous Distance Learning Tool.	HICSS	2004	DBLP DOI BibTeX RDF
1	Eric L. Santanen, Gert-Jan de Vreede	Creative Approaches to Measuring Creativity: Comparing the Effectiveness of Four Divergence thinkLets.	HICSS	2004	DBLP DOI BibTeX RDF
1	Shyamala C. Sivakumar, William Robertson	Development of an Effective Remote Interactive Laboratory for Online Internetworking Education.	HICSS	2004	DBLP DOI BibTeX RDF
1	Sita Ramakrishnan, Ashley Cambrell	Muse over University Organisational Ecology in Action and Service-Oriented Architectures.	ICECCS	2004	DBLP DOI BibTeX RDF