The Foundation Component represents the entire WHO-FIC universe. It is a multidimensional collection of interconnected entities and synonyms. These entities consist of diseases, disorders, injuries, external causes, signs and symptoms, functional descriptions, interventions, and extension codes. ICD-11 statistical core (MMS) is derived from this foundation, ICF and ICHI will follow.
The entities in the Foundation Component:Linearizations are similar to the classical print versions of ICD Tabular List (e.g. volume I of ICD-10 or other previous editions). Various linearizations could be built at different granularity, use case or other purposes such as for Primary Care, Clinical Care or Research. The linkage from the foundation component to a particular linearization will ensure consistent use of the classifications.
You may click the [Log In] link to sign in to the system. If you don't already have an account, it's very easy to setup one using the same link.
When browsing ICD-11, you will see the classification hierarchy on the left side of the screen. Clicking on any item will display the details of that entity on the right side of the screen
Initially, the system only shows the top level items. However, you may make the children visible by clicking on the small triangles on the left side of the items.
You could use the 
button to close all of the open branches and return back to the top level hierarchy