Impress is able to create an SVG slideshow from a presentation that can be shown eg. in a browser (so it's portable). SVGs can be expored via File -> Export..., but normally only the current/selected sheets are exported.
The way to export the whole slideshow is to first select all the slides, and then save it via File -> Export...
It would be nice if there was a separate menu item for this, similar to Export as PDF..., the difficulty is that naming it Export as SVG... would be confusing (compared to the current way to export SVGs of slides, which works as described above). Another suggestion for the name: Export as SVG Slideshow...
Note that no options are need for the export, a file picker is enough.
Actually, maybe it would be enough to add a separete entry in the Export... file picker, ie. SVG Slideshow alongside the current SVG - Scalable Vector Graphics entry? (the extension would be SVG(Z) in both cases, which might also be a bit confusing)
UX team, what's your opinion?
Agree the current Export to SVG is not really obvious for rendering a full Impress presentation to a SVG (SMIL2.0) based presentation.
An "Export to SVG slide presentation" or similar entry seems reasonable.
Maybe could be done with an "Export As" split menu, much as was done adding EPUB export from Writer?
Or maybe we should just add a dialog (like some picture export formats already have) when SVG is chosen, where the user selects what kind of export should actually be performed.
If we have more than one SVG menu item, I'm afraid that users don't know the difference. Can both items be (re-)named to be absolutely clear?
An extra SVG export dialog would unify different export menu items and gives room for clear explanation. So +1 to Tomaz' suggestion despite that LO should avoid new dialogs as far as possible to simplify GUI.
+1 for Stuart's harmonization with Writer idea. That means we have an entry "Export As" with items underneath "Export as PDF..." and "Export as SVG...". The ellipsis indicate the dialog that offers export options. Not sure how well our HTML export works but that's also a quite common format for presentations and could amend the sub menu.