What is MIME type "application/kurzweil"?

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

application/kurzweil is a MIME type linked to files created by Kurzweil 3000 software. It tells the operating system and browsers how to handle these specialized documents.
Files with this MIME type use the KES extension.

The type ensures that the correct application opens the file, preserving features such as text-to-speech, annotation, and highlighting.

Main use case: Processing and displaying Kurzweil 3000 documents in educational settings.
Key facts: Supports accessibility tools and enhances reading or learning activities.
Practical role: Helps users work with complex document formats that embed interactive reading features.

Further details are available at Kurzweil Education Technology.

Associated file extensions

.kes

Usage Examples

HTTP Header

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


    Content-Type: application/kurzweil

HTML

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


    <a href="file.dat" type="application/kurzweil">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/kurzweil');    
      res.end('Content here');    
    }).listen(3000);

Associated file extensions

.kes

FAQs

What is the application/kurzweil MIME type used for?

The MIME type application/kurzweil identifies documents created by Kurzweil 3000, an assistive technology tool for literacy. These files, typically using the .kes extension, contain text, audio markers, and annotations to support text-to-speech reading.

How do I configure Apache to serve .kes files correctly?

To ensure browsers recognize the file type, add the following line to your .htaccess file or main configuration: AddType application/kurzweil .kes. This prevents the server from sending the file as generic text or binary data.

Why won't my browser display application/kurzweil files?

Web browsers like Chrome, Firefox, and Edge do not have built-in support for rendering Kurzweil documents. Instead of displaying the content, the browser will usually download the file so it can be opened externally by the Kurzweil 3000 software.

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

You need to update your mime.types file or the types block in your nginx.conf. Add the entry application/kurzweil kes; to map the extension to the correct content type header.

Why does IIS return a 404 error for .kes files?

Microsoft IIS often blocks file extensions it does not recognize by default. To fix this, open IIS Manager, navigate to MIME Types, and add a new entry with the extension .kes and the MIME type application/kurzweil.

Can I convert application/kurzweil files to other formats?

Yes, users with the Kurzweil 3000 software can usually export or "Save As" to more common formats like PDF, MP3 (audio), or DOCX. However, converting away from .kes may lose specific accessibility features like dynamic highlighting.

Is application/kurzweil a standard IANA media type?

No, it is a vendor-specific identifier used by Kurzweil Education Systems. While not a global standard like application/json, it is the recognized string for ensuring the operating system launches the correct assistive software.

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.