while a community of practice provides support for personal knowledge creation . Trust is central to knowledge sharing in this model. Nonaka has returned to his earlier work in an attempt to further develop his ideas about knowledge creation Personal knowledge management can also be viewed along two main dimensions, personal knowledge and personal management . Zhang has developed a model of PKM in relation to organizational knowledge management (OKM) that considers two axes of knowledge properties and management perspectives, either organizational or personal. These aspects of organizational and personal knowledge are interconnected through the OAPI process (organizationalize, aggregate, personalize, and individualize), whereby organizational knowledge is personalized and individualized and personal knowledge is aggregated and operationalized as organizational knowledge . Criticism It is not clear whether PKM is anything more than a new wrapper around personal information management (PIM). William Jones argued that only personal information as a tangible resource can be managed, whereas personal knowledge cannot . Dave Snowden has asserted that most individuals cannot manage their knowledge in the traditional sense of "managing" and has advocated thinking in terms of sensemaking rather than PKM . Knowledge is not solely an individual product—it emerges through connections, dialog, and social interaction (see Sociology of knowledge). However, in Wright's model, PKM involves the application to problem-solving of analytical, information, social, and learning dimensions, which are interrelated , and so is inherently social. An aim of PKM is "helping individuals to be more effective in personal, organizational and social environments" , often through the use of technology such as networking software. It has been argued, however, that equation of PKM with technology has limited the value and utility of the concept (e.g. , ). In 2012, Mohamed Chatti introduced the personal knowledge network (PKN) model to KM as an alternative perspective on PKM, based on the concepts of a personal knowledge network and knowledge ecology . Skills Skills associated with personal knowledge management include: Collaboration skills. Coordination, synchronization, experimentation, cooperation and design. Communication skills. Perception, intuition, expression, visualization and interpretation. Creative skills. Imagination, pattern recognition, appreciation, innovation, inference. Understanding of complex adaptive systems. Information literacy. Understanding what information is important and how to find unknown information. Manage learning. Manage how and when the individual learns. Networking with others. Knowing what your network of people knows. Knowing who might have additional knowledge and resources to help you Organizational skills. Personal librarianship. Personal categorization