An InformationDataStructure is a data structure for storing RealInformation. Real information is imprecise by nature. it has no natural order. It's context is more important than it's associated data. It can be kept in a variable, providing context to a piece of data rather than in a hardcoded format such as xml, or objects. You see, each piece of data in one of these formats is important information only within the context that it resides, for example 'patient-name-firstname' can be a context for the name 'Jon'. 'Jon' is the data and 'patient-name-firstname' is the information. In an information data structure, this information is kept in a variable rather than as literal in the form of xml tags or class fields. Information data structures are used in InformationModeling.
Some Examples: