/Alias ODB tree
Purpose
The ODB /Alias tree provides the user with a way to access other webpages via buttons placed on the mhttpd Status Page. It can provide links to external webpages, or symbolic links (short-cuts) to ODB sub-trees.
Creating the /Alias tree
The /Alias tree is optional, and is not present until created by the user.
Keys in the /Alias tree
Any key created under /Alias will appear as a button (i.e. alias-button) on the Status Page, with the same name as the key (except as noted below).
By default, the clicking of an alias-button in the web interface will spawn a new frame. To force the display of the alias page in the same frame, an "&" has to be appended to the name of the alias key. The "&" is stripped off the alias name when it appears as an alias-button (see example).
External links
The following odbedit commands demonstrate how to make a link to an external webpage:
[local:t2kgas:S] cd /Alias [local:t2kgas:S]create string triumf String length [32]: [local:t2kgas:S] set triumf "http://triumf.ca"
This will cause a button triumf on the status page, Clicking on this alias-button will show the contents of the link in a new frame.
Symbolic Links
The /Alias tree may also contain a list of symbolic links to any desired ODB location.
The following odbedit commands demonstrate creating alias-buttons linking to ODB keys :
[local:t2kgas:S] cd /Alias
[local:t2kgas:S] ln /Equipment/TpcGasPlc/Common/ "TPC Common" *** New frame, no &
[local:t2kgas:S] ln /Equipment/TpcGasPlc/Settings/ "TPC Settings&" *** Same frame, with &
(comments are preceded by ***)
This would create two alias-buttons TPC Common and TPC Settings. Clicking on TPC Common would open the page in a new frame. Clicking on TPC Settings would open the page in the same frame (see above).