What is MIME type "text/x-agda"?
A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.
text/x-agda is the MIME type assigned to files containing Agda source code. Agda is a dependently typed programming language and proof assistant. Its code is written in plain text and is used for both programming and formal verification.Files marked with this MIME type, such as AGDA, are processed by dedicated Agda tools that offer syntax highlighting, type checking, and proof validation. These tools read the file, analyze its structure, and provide advanced code support.
Main use case:
- Authoring proofs and programs in a language designed for both computation and rigorous mathematical proofs.
- Syntax highlighting and other editor integrations that enhance readability and reduce errors.
- Static analysis where the code is checked for logical consistency before compilation or proof checking.
- Formal verification workflows where every line of code may represent a step in a mathematical proof.
For additional information on Agda, visit the Agda Website.
Associated file extensions
Usage Examples
HTTP Header
When serving content with this MIME type, set the Content-Type header:
Content-Type: text/x-agda
HTML
In HTML, you can specify the MIME type in various elements:
<a href="file.dat" type="text/x-agda">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', 'text/x-agda');
res.end('Content here');
}).listen(3000);
Associated file extensions
FAQs
What is the text/x-agda MIME type used for?
The text/x-agda MIME type identifies source code files written in the Agda programming language. These are plain text files, typically ending in .agda, used for dependently typed functional programming and formal verification.
How do I configure Apache to serve Agda files correctly?
To ensure Apache serves these files with the correct headers, add the AddType directive to your .htaccess file or server configuration. Use the line AddType text/x-agda .agda to map the extension to the MIME type.
How do I add text/x-agda support to an Nginx server?
You need to update your mime.types file, which is often found in /etc/nginx/. Add the line text/x-agda agda; inside the types { ... } block, then reload Nginx using sudo nginx -s reload.
Will web browsers execute code served as text/x-agda?
No, web browsers do not natively execute Agda source code. Because the type starts with text/, browsers will usually render the content as a plain text document. To run Agda on the web, the code must typically be compiled to JavaScript first.
Why does the MIME type start with 'x-'?
The x- prefix signifies that this is a non-standard or experimental subtype that has not been officially registered with the IANA. It is the convention used for custom types like Agda to ensure they do not conflict with future standard definitions.
What software opens text/x-agda files?
Since these are text files, any text editor can open them. However, for actual development, specialized editors like Emacs (with agda-mode) or VS Code are recommended to utilize the language's interactive proof-checking features.
Why is my browser downloading the .agda file instead of showing it?
This occurs if the server is misconfigured and serves the file as application/octet-stream. You must configure the web server to send the text/x-agda or text/plain Content-Type header so the browser knows it is safe to display inline.
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.