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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.
PTX at a glance
PTX
Digital photography fragmented into many manufacturer-specific raw formats because camera makers optimized for their own sensors, metadata, and software ecosystems rather than for one shared public raw standard.
Format comparison
| Feature | VML | PTX |
|---|---|---|
| File type | Vector | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1998 | 2005 |
| Inventor | Microsoft, Macromedia, Autodesk, Hewlett-Packard, Visio | Pentax (now Ricoh) |
| Status | legacy | proprietary |
| 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 PTX.
- VML is commonly used in vector workflows.
When to use PTX
- Your target workflow expects PTX.
- Improve delivery compatibility with PTX.
- PTX is commonly used in image workflows.
FAQs
Why convert VML to PTX?
Convert to PTX when preserving compatibility with an existing proprietary capture archive or working inside a specialist workflow that still expects it.
It is mainly an archival and migration format.
What changes when converting VML to PTX?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to PTX removes vector scaling.
What should I review after converting VML to PTX?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.