Vex can scan the URLs (path) also.
For example, in the following case,
"aaaa", "bbbb", and "cccc" are parameters to be scanned.
If the value contained in the path changes and an error occurs unless the value to be generated is handed over every access, the value can be handed over by Handler setting.
*For the setting method, refer to the VEX Handler Guide > "Assigning values to PATHINFO".