#### Problem
The PST features in wikitext are things like `~~~~` (becomes a signature on-save), pipe trick on links `[[Title (disambig)|]]` (becomes `[[Title (disambig)|Title]]` on save), and `{{subst:#time:}}` which can insert the current date.
These can be used in templates and in passing text, but not inside extension tags such as `<ref>` or `<gallery>`.
#### Use cases
* Adding a signed caption inside a gallery, for example on a wikiproject page, or talk page. `<gallery>File:Example|I like this one. ~~~~</gallery>`.
* Using the current date as the default for template parameters. `<ref>{{Cite web|title=|url=|access-date={{subst:#time:Y-m-d}}}}</ref>`
>>! **Original bugzilla description by `dbenbenn`**:pipe trick in links inside gallery captions.
>
> See [[User:Dbenbenn/sandbox#Gallery_pipe_trick]],* Using the current date as the default for template parameters. for example. A
> link in the caption of a gallery image ending in |]] is broken.`<ref>{{Cite web|title=|url=|access-date={{subst:#time:Y-m-d}}}}</ref>`