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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.
PAM at a glance
PAM
PBM, PGM, PPM, PNM, and later PAM come from the tool-centric tradition of keeping image interchange formats easy to parse, script, and transform.
Format comparison
| Feature | VML | PAM |
|---|---|---|
| File type | Vector | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1998 | 2000 |
| Inventor | Microsoft, Macromedia, Autodesk, Hewlett-Packard, Visio | Jef Poskanzer / Netpbm lineage |
| Status | legacy | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| 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 PAM.
- VML is commonly used in vector workflows.
When to use PAM
- Your target workflow expects PAM.
- Improve delivery compatibility with PAM.
- PAM is commonly used in image workflows.
FAQs
Why convert VML to PAM?
Convert to PAM when using Unix-style image tools or scripted workflows that benefit from a simple, explicit raster container with more flexibility than PBM/PGM/PPM.
It is useful as an intermediate technical format.
What changes when converting VML to PAM?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to PAM removes vector scaling.
What should I review after converting VML to PAM?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.