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Open FixedDocumentSequence.fdseq from the file with ZipArchive, ZipArchiveEntry, ...
There should be
"http://schemas.microsoft.com/xps/2005/06"
or
"http://schemas.openxps.org/oxps/v1.0"
detect xps and oxps
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(115.19999999999999, 77%, 21%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPV%3C/text%3E%3C/svg%3E)
Peter Volz
1,295
Reputation points
Hello experts I wanna use Stream to open xps and oxps files and read the first bytes to detect if it's xps or oxps ? I think their difference is at least the 11th byte, anyone knows their magic numbers? For xps and oxps? Thanks.
Developer technologies | VB
Developer technologies | C#
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(128, 8%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
Anonymous2024-01-27T20:25:11.3866667+00:00 Ah well, my 'bump' comment, made to kick this forum awake, was deleted. Maybe this one will make my original comment appear.
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Anonymous
2024-01-27T20:27:06.3733333+00:00 Well, the comment to kick the forum awake did not work as my original comment still not visible. To repeat it. Magic Number may be: Hex: 50 4B 03 04
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Peter Volz 1,295 Reputation points
2024-01-27T21:22:25.76+00:00 Thanks, but Hex: 50 4B 03 04 is for zip files, and will be true for both xps and oxps, so can't distinguish them, thought might need to read more bytes to detect the formats?
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Accepted answer
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Castorix31 90,686 Reputation points2024-01-27T23:18:38.21+00:00 -
Peter Volz 1,295 Reputation points
2024-01-29T12:58:27.36+00:00 Thanks, both links are not working, can you please verify?
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Castorix31 90,686 Reputation points
2024-01-29T14:39:51.75+00:00 Those are not links, but different text inside FixedDocumentSequence.fdseq file depending on whether the file is xps or oxps
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