Thank you for asking that question, Alex.
filters-impress.odt (Writer version of filter.impress)
filters-impress.ods (Calc version of filter.impress) (added 2015-11-18)
(filter.impress is hand-extracted from impress.xcd)
:~$ /opt/libreoffice5.0/program/soffice.bin --version
LibreOffice 5.0.0.5 437e4abdf9e72fd0a6e6f8697a0e659bc77f9b10
:~$ cat filter.impress | wc -l
21
Obtained from /opt/libreoffice5.0/share/registry/impress.xcd; Debian 6.0:
:~$ cat filter.impress | sort
"Apple Keynote" application/x-iwork-keynote-sffkey Extensions:key
"ClarisWorks/AppleWorks Presentation" application/clarisworks Extensions:cwk
"Impress 6.0 Template (OpenOffice.org 1.0 Presentation Template)" application/vnd.sun.xml.impress.template Extensions:sti
"Microsoft PowerPoint 2007-2013 XML" application/vnd.openxmlformats-officedocument.presentationml.presentation Extensions:pptx pptm
"Microsoft PowerPoint 2007-2013 XML AutoPlay" application/vnd.openxmlformats-officedocument.presentationml.slideshow Extensions:ppsx
"Microsoft PowerPoint 2007-2013 XML Template" application/vnd.openxmlformats-officedocument.presentationml.template Extensions:potm potx
"Microsoft PowerPoint 97-2003" application/vnd.ms-powerpoint Extensions:ppt
"Microsoft PowerPoint 97-2003 AutoPlay" application/vnd.ms-powerpoint Extensions:pps
"Microsoft PowerPoint 97-2003 Template" application/vnd.ms-powerpoint Extensions:pot
"ODF Drawing (Impress) (Draw 8)" application/vnd.oasis.opendocument.graphics Extensions:odg
"ODF Presentation (Impress 8)" application/vnd.oasis.opendocument.presentation Extensions:odp
"ODF Presentation Template (Impress 8 Template)" application/vnd.oasis.opendocument.presentation-template Extensions:otp
"Office Open XML Presentation" application/vnd.openxmlformats-officedocument.presentationml.presentation Extensions:pptx pptm
"Office Open XML Presentation AutoPlay" application/vnd.openxmlformats-officedocument.presentationml.slideshow Extensions:ppsx
"Office Open XML Presentation Template" application/vnd.openxmlformats-officedocument.presentationml.template Extensions:potm potx
"OpenDocument Presentation Flat XML" application/vnd.oasis.opendocument.presentation-flat-xml Extensions:fodp odp xml
"OpenOffice.org 1.0 Drawing (Impress)" Extensions:
"PDF - Portable Document Format" application/pdf Extensions:pdf
"PWP - PlaceWare" Extensions:pwp
"StarOffice XML (Draw) (OpenOffice.org 1.0 Drawing) (Draw 6.0)" application/vnd.sun.xml.draw Extensions:sxd
"StarOffice XML (Impress) (OpenOffice.org 1.0 Presentation)" application/vnd.sun.xml.impress Extensions:sxi
If this helps then please show you like it with an uptick (∧)