# Hierarchical Navigation **Navigation block that displays the current topic, its parent and children (if any).** %BR% This is intended to be included in other topics, for example in a side navigation bar ([[WebLeftBar]]). _NOTE: The lookup for parent and children will increase the loading time of your pages._
## Usage Two sections are defined: - `all` - `children` ### Displaying the Parent - Current - Children block > %INCLUDE{"%SYSTEMWEB%.HierarchicalNavigation" section="all"}% generates: When included in [[WebLeftBar]] (using default Pattern skin) this is styled to:

### Displaying child topics > *Child topics:* > %INCLUDE{"%SYSTEMWEB%.HierarchicalNavigation" section="children"}% generates: **Child topics:** When included in [[WebLeftBar]] (using default Pattern skin) this is styled to:

%STARTSECTION{name="all"}%
%ENDSECTION{name="all"}% %STARTSECTION{name="children"}%
%ENDSECTION{name="children"}%%ENDSECTION{name="children"}% %STARTSECTION{name="childlist"}%%SEARCH{ "parent.name='%BASETOPIC%'" web="%BASEWEB%" type="query" nonoise="on" format="
  • [[$web.$topic][$topic]]
  • " }%%ENDSECTION{name="childlist"}%