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What is more important, introduction of the 2D-information space allows applying object-oriented principles to information. Idea three. We can integrate individual Instances to reflect similar concepts as a class. The top Levels outline main ideas for that class, and can be shared. The 2D-information structure is a convenient mechanism for continues object-oriented improving of the content. The users' subjective structuring may be less than perfect at any particular point of time, and the process of improving and refining, in fact, may never be completed. The object-oriented design of 2D-information objects ensures the ability to continue this process as a built-in feature. Instances originate from the same class. While instances are unique, they may be interchanged (substituted by each other). 2D-info Space users are able to make their selections, as well as to limit number of instances in their files to reduce complexity. In addition, they can control the «general-part» focus. To make a right decision, there is no need to know about all instances and details. Quite the contrary, we can analyze complex data correctly only if we disengage (abstract) ourselves and eliminate all unnecessary details. With the 2D-info Space, content of the information variables can be modified in its further subclasses. As instance variables defined in the class declaration exists in every (child) object created from the class, we actually can subclass information! Idea four. Generally, the process of new knowledge development evolves in the direction toward original interpreting and modifying of already known information classes, rather than creating new ones. The future needs technologies like the 2D-info Space to implement an incremental improvement of the information classes. Optimal solution combines development of initial content with providing continuous individual and collaborative editing. If your point or view extends what has been written and said, there is no need to write a new article: with the 2D-info Space we can program only differences! To create and share customized versions of the library, users operate with Java files, which comprise only their personal modifications to the library. The files describe information as set of objects. It allows writing data (notes, articles, lessons, and the whole books) in a way object-oriented software has been developed! The 2D-info Space provides a mechanism to extend information. This can be achieved by integrating individual points of view as instances of a particular page. Very often, versions of different users are just different definitions of the same concepts. Nevertheless, every user believes his or her version is the best. In the 2D-info Space, we can have arrays of versions. A specific choice is replaced by the array of instances. The 2D-info Space provides an opportunity to change prioritization of information, and this is implemented by SELECT function. Considering a "liquid" nature of information, instead of dealing with clearly defined crisp choices, the 2D-info Space works with a more flexible notion- their Priority. The 2D-information space contains all (!) available choices, but their priority is a variable, which depends on the current prevailing opinion of users. The 2D-info Space is a kind of collaborative network rather than a program for a single user. It can be compared to a giant integrator, referring to information fragments from different sources. Although 2D-information programs can be very efficient in a groupware environment, first of all, they are personal tools. The SELECT function can be compared to a sophisticated marker, which can be used during reading information in electronic form. For example, during reading a conventional book with hundreds of pages, we can make some bookmarks or write remarks on a page. If several months later you open the book, from what page you would start to read? Instead of reading the book from the first page, one would go directly to his or her remarks. These individual bookmarks and comments have some additional meaning for a person. They enter personal information space. Advantages of using the 2D-info Space include convenience of the bookmarking. When users open 2D-information file, they start reading the version of a content, which was compiled from their most recent selections. For example, in the 2D-infoExplorer there is button, which marks a current fragment on screen to allow creating your personal order of available fragments. According to this list of personal priority, order of viewed fragments may be re-arranged. As a result, the 2D-infostructure contains information about which fragments have actually been selected after reading. Note: the list of selections is formed in a reverse order to convey an idea that the most recent selections have a higher priority. Another key word in the 2D-info Space environment is CONNECT: We can link our personal notes with online databanks, fragments in courseware, and even digital e-Books libraries to develop both personal and groupware online databanks. Users are not just adding new information to a knowledge bank. They show how the new data can be connected with what is already there, - with already known knowledge. Users can connect any two information fragments. Any two pieces of knowledge he or she believes are important to be related. The connection may be subjective, as it reflects just a personal view, - we do it all the time. But for other users, value of this connection is reflected only by its position in this information universe. The position is not fixed; it is described by instance priority and can be changed dynamically. The priority is a function of number of users, who marked (selected) the connection for their own use. The selecting can be compared with making permanent bookmarks in this constantly changing information environment. If not selected, text may disappear by next session. Consequently, the more users think some view is attractive, the higher its priority. Among other things, the system stimulates expressing ideas in a clear form to be understandable by other people or a professional community. If an instance is rather vague, readers can create its version with a more precise wording. The difference is the latter version will be more popular among users.

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