Powerpoint add slide howto

copy all the constant stuff over
for slide1 ONLY replace the image name
for all other slides, derive from slide1.xml and .xml.rels
copy all the mods over, in modified version

docProps/app.xml

Change number of slides:
- from <Slides>1
- to <Slides>n
- replace $NUM_SLIDES

ppt/_rels/presentation.xml.rels

Add a new like for slide1 with a new Id "rId{ 11 + n }"
replace $RELATIONSHIPS

<Relationship Id="rId5" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/slide" Target="slides/slide1.xml"/>

ppt/slides/slide[1].xml -> slide[n].xml

Change id="4" name="Grafik 4"
- to id="{n}" name="Grafik {3 + n}descr="slides generated image {n}"
- replace ==$GRAPHIC_ID==
Change <a16 ... id={} to a new guid
- replace ==$GUID==
- 6A92AC38-201A-B559-9037-63C6F3D7798E
Change <p14 ... val="" to a new decimal id
- replace ==$ID==
- 1577499883

ppt/slides/_rels/slide[n].xml.rels

Just copy and adjust the target path to the image -> rename to image{n}.png
- replace ==$IMG_NAME==

ppt/presentation.xml

Add new <p:sldId id="{ 255 + n }" r:id="rId{ 11 + n }" ...
- replace ==$SLIDE_IDS==

[Content_Types].xml

Add new tag for the new slides
- replace ==$SLIDES==

<Override PartName="/ppt/slides/slide1.xml" ContentType="application/vnd.openxmlformats-officedocument.presentationml.slide+xml"/>