There are two basic kinds of info objects in the Knowledge Warehouse:

• Content objects
• Structure objects

Content objects are independent units of information containing different kinds of information contents (text, graphs, audio-visual). They are displayed in the Web Browser in a dedicated frame called the Content Frame.

Structure objects contain hierarchically organized links to other info objects. They are also displayed in the Browser in a dedicated frame called the Structure Frame or TOC (Table of Contents) Frame. The root node of a structure always refers to a content object that is displayed in the Content Frame. Structures are used to create a structured presentation of a set of info objects and to navigate in these contents. Since structures, in contrast to content objects, do not contain any language information, they are not language-specific.

Since content objects can be referenced in structures and with hyperlinks in other content objects, they can be used as often as required.

Since structures can be referenced in other structures as a substructure, they can also be used more than once. A structure can be referenced with either a link or an include. In the latter case, the structure display is transparent, i.e. when you navigate from the starting structure to the included structure the entire structure remains visible in the Browser. When you reference a structure with a structure link, however, only the referenced structure is displayed.

Each info object is assigned to exactly one folder containing all the versions of the object. Info objects can be referenced in the info objects of any other folders, even if they are not themselves contained in that folder.

Content objects are not assigned a technical, internal structure. However, the content objects of certain info object classes can be classified with the Content type attribute and assigned the corresponding formatting with the appropriate content templates.