# 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{"%TWIKIWEB%.HierarchicalNavigation" section="all"}%
generates:
When included in [[WebLeftBar]] (using default Pattern skin) this is styled to:
### Displaying child topics
> *Child topics:*
> %INCLUDE{"%TWIKIWEB%.HierarchicalNavigation" section="children"}%
generates:
**Child topics:**
TWiki Installation Error
Incorrect format of searchformat template (missing sections? There should be 4 %SPLIT% tags)
TWiki Installation Error
Incorrect format of searchformat template (missing sections? There should be 4 %SPLIT% tags)
TWiki Installation Error
Incorrect format of searchformat template (missing sections? There should be 4 %SPLIT% tags)