What is MIME type "application/vnd.ms-visio.drawing.macroenabled.main+xml"?

A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.

The MIME type application/vnd.ms-visio.drawing.macroenabled.main+xml is used for Microsoft Visio files that allow embedded macros. It is an XML-based format that stores vector graphics and interactive scripting information.

This format is common in business environments. It helps users automate diagram tasks and integrate dynamic data.

Automation: Macros help run repetitive tasks automatically.
Dynamic Diagrams: Embedded scripts can update or modify the drawing.
Data Integration: It supports linking diagrams to external data sources.

Files of this type use the extension VSDM. Software identifies this MIME type to ensure proper processing of its XML structure and macro content.

Additional details can be found at the IANA Media Types Database.

Associated file extensions

.vsdm

Usage Examples

HTTP Header

When serving content with this MIME type, set the Content-Type header:


    Content-Type: application/vnd.ms-visio.drawing.macroenabled.main+xml

HTML

In HTML, you can specify the MIME type in various elements:


    <a href="file.dat" type="application/vnd.ms-visio.drawing.macroenabled.main+xml">Download file</a>

Server-side (Node.js)

Setting the Content-Type header in Node.js:


    const http = require('http');    
    
    http.createServer((req, res) => {    
      res.setHeader('Content-Type', 'application/vnd.ms-visio.drawing.macroenabled.main+xml');    
      res.end('Content here');    
    }).listen(3000);

Associated file extensions

.vsdm

FAQs

What is the file extension for application/vnd.ms-visio.drawing.macroenabled.main+xml?

The standard file extension for this MIME type is .vsdm. This extension indicates a Microsoft Visio drawing that uses the Open XML format and includes embedded macros for automation.

How does a VSDM file differ from a VSDX file?

While both are XML-based Visio drawings, a VSDM file allows the execution of Visual Basic for Applications (VBA) macros. A standard .vsdx file is strictly data-only and cannot run scripts, making the VSDM format necessary only when automation features are required.

Are there security risks when opening files with this MIME type?

Yes, because this MIME type supports executable macros, it can potentially carry malware or viruses. You should exercise caution and only open .vsdm files from trusted sources, unlike the safer, macro-free application/vnd.ms-visio.drawing.main+xml type.

Can web browsers display this MIME type natively?

No, browsers like Chrome, Firefox, and Edge do not have built-in support for rendering Visio files. If a web server serves a file with this Content-Type, the browser will typically prompt the user to download the file rather than displaying it.

How do I configure IIS to serve VSDM files correctly?

In Internet Information Services (IIS), you must add a MIME map to the web.config file or via the IIS Manager. Map the file extension .vsdm to the type application/vnd.ms-visio.drawing.macroenabled.main+xml to ensure clients handle the file correctly.

What software is required to open this MIME type?

You need Microsoft Visio 2013 or later to fully utilize the macro capabilities of this format. The free Microsoft Visio Viewer can display the visual content of the drawing, but it cannot execute the embedded macros.

How do I add support for this MIME type in Nginx?

You can add the type to your mime.types file or inside a specific server block. Add the line application/vnd.ms-visio.drawing.macroenabled.main+xml vsdm; to ensure Nginx serves the file with the correct headers.

General FAQ

What is a MIME type?

A MIME (Multipurpose Internet Mail Extensions) type is a standard that indicates the nature and format of a document, file, or assortment of bytes. MIME types are defined and standardized in IETF's RFC 6838.

MIME types are important because they help browsers and servers understand how to process a file. When a browser receives a file from a server, it uses the MIME type to determine how to display or handle the content, whether it's an image to display, a PDF to open in a viewer, or a video to play.

MIME types consist of a type and a subtype, separated by a slash (e.g., text/html, image/jpeg, application/pdf). Some MIME types also include optional parameters.

How do I find the MIME type for a file?

You can check the file extension or use a file identification tool such as file --mime-type on the command line. Many programming languages also provide libraries to detect MIME types.

Why are multiple MIME types listed for one extension?

Different applications and historical conventions may use alternative MIME identifiers for the same kind of file. Showing them all helps ensure compatibility across systems.