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VML at a glance
VML
VML emerged as a 1998 W3C submission backed by Microsoft and partners such as Autodesk, Hewlett-Packard, Macromedia, and Visio, reflecting the moment when web graphics standards were still unsettled.
PNM Raw at a glance
PNM Raw
PNM survived because engineers kept needing a no-drama raster family for scripts, fixtures, codecs, and image-processing experiments where the format should not be the hard part.
Format comparison
| Feature | VML | PNM Raw |
|---|---|---|
| File type | Vector | Image |
| Extensions |
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| MIME type |
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| Created year | 1998 | 1988 |
| Inventor | Microsoft, Macromedia, Autodesk, Hewlett-Packard, Visio | Jef Poskanzer |
| Status | legacy | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
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| Layer support | Not supported | Not supported |
| Vector scaling | Supported | Not supported |
When to use each format
When to use VML
- Your source file is already in VML.
- Preserve source expectations before exporting to PNM Raw.
- VML is commonly used in vector workflows.
When to use PNM Raw
- Your target workflow expects PNM Raw.
- Improve delivery compatibility with PNM Raw.
- PNM Raw is commonly used in image workflows.
FAQs
Why convert VML to PNM Raw?
Convert to PNM raw when you need a no-frills lossless raster format for scripts, benchmarking, image-processing experiments, or toolchains that prefer direct pixel access with minimal container complexity.
It is especially useful as an intermediate representation between automated processing steps.
What changes when converting VML to PNM Raw?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to PNM Raw removes vector scaling.
What should I review after converting VML to PNM Raw?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.