This paper introduces the notion of context-aware mobile hypermedia. Contextawareness means to take the users' context such as location, time, objective, community relations etc. into account when browsing, searching, annotating, and linking. Attributes constituting the context of the user may be sensed automatically and/or be provided by the user directly. When being mobile the user may achieve context-aware hypermedia support on a variety of small and medium sized computing platforms such as mobile phones, PDAs, tablet PCs and laptops. This paper introduces the HyCon (HyperContext) framework with an architecture for context-aware hypermedia. The architecture includes interfaces for a sensor tier encapsulating relevant sensors, and it represents the hypermedia objects in structures based on the XLink and RDF standards.A prototype called the HyConExplorer created with the framework is presented, and it is illustrated how the classical hypermedia features such as browsing, searching, annotating, linking, and collaboration are supported in contextaware hypermedia. Among the features of the HyConExplorer are real-time locationbased searches via Google collecting hits within a specified nimbus around the user's GPS position. Finally, use scenarios for and evaluation of the use of the HyConExplorer in public school projects are discussed.

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In this paper, our experiences so far with developing a platform for mobile P2P applications with the LightPeers framework are presented. We experienced that the use of a role-based approach in the initial application development phase showed useful. The roles provide a high-level abstraction for common peer behavior within a session, and are suitable for describing a specific setup of peers, e.g., when developing a new system.

This paper describes the LightPeers platform for lightweight mobile pure P2P networking, developed to support groups of pupils outside the school buildings in the field using a variety of mobile devices such as Tablet PCs, PDAs, and mobile phones, to produce, organize, present, and share digital material.

This paper describes how the XML based RSS syndication formats used in weblogs can be utilized as the distribution medium for geo-spatial hypermedia, and how this approach can be used to create a highly distributed multi-user annotation system for geo-spatial hypermedia. It is demonstrated, how the HyCon annotation model [2] can be formulated as a RSS 2.0 feed and how such feeds allow annotation threads to be distributed across multiple weblogs and servers.