What is MIME type "application/x-wais-source"?

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

application/x-wais-source is a MIME type for files used in the WAIS system. It designates a text-based source file that contains data or commands for document indexing and search retrieval.

WAIS, short for Wide Area Information Servers, was an early system for full-text searching across distributed databases. Files with this MIME type help drive the search engine’s configuration and indexing processes.

Main use case: The file stores source data that WAIS systems use to parse, index, and search documents.
Additional uses: It can hold configuration settings or metadata. It may be part of legacy systems that still rely on WAIS protocols.
Technical note: The prefix “x-” marks this MIME type as experimental or non-standard, meaning it was designed for specific, often historical, purposes.

Files labeled with this MIME type are typically saved with the SRC extension. For further details on MIME types and legacy file formats, you may consult resources such as IANA Media Types.

Associated file extensions

.src

Usage Examples

HTTP Header

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


    Content-Type: application/x-wais-source

HTML

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


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

Associated file extensions

.src

FAQs

What is the primary use of application/x-wais-source?

The MIME type application/x-wais-source is used to identify source files for the Wide Area Information Servers (WAIS) system. These text-based files contain configuration commands and data used to index documents and facilitate full-text searches across distributed databases.

Which file extension is linked to application/x-wais-source?

This MIME type is historically associated with the .src file extension. You can learn more about this extension at .src, though note that in modern contexts, .src is sometimes used generically for source code rather than WAIS data.

How can I view the contents of an application/x-wais-source file?

Because these files are fundamentally text-based, you can view them using any standard text editor, such as Notepad, TextEdit, or Sublime Text. While early internet clients processed them automatically, modern software will simply treat them as plain text.

Do modern web browsers support WAIS source files?

No, modern browsers like Chrome, Firefox, and Edge do not have native support for the WAIS protocol or the application/x-wais-source type. If a server sends this header, the browser will usually trigger a file download.

How do I configure Apache to serve .src files with this MIME type?

To explicitly map the extension to this MIME type in Apache, add the following line to your .htaccess file or main configuration: AddType application/x-wais-source .src. This ensures the server sends the correct Content-Type header.

Why does this MIME type start with "x-"?

The prefix x- designates the type as non-standard or experimental. It indicates that application/x-wais-source was created for a specific application (WAIS) without being a fully standardized type in the primary IANA registry.

Is application/x-wais-source the correct type for generic source code?

Generally, no. While the extension .src is often used for generic source code, those files are better served as text/plain or a language-specific type (like text/x-c). application/x-wais-source implies the file is formatted specifically for the legacy WAIS indexing system.

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.