What is MIME type "application/vnd.openxmlformats-officedocument.spreadsheetml.document"?

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.openxmlformats-officedocument.spreadsheetml.document marks a file as part of the Office Open XML family. It is meant for storing structured spreadsheet data.

This format packages XML files within a compressed container. It keeps document parts separate but related. The structure allows for formulas, charts, and rich formatting. It also holds metadata and revision history.

• Main use: Managing data in tables with rows and columns.
• Technical structure: A ZIP archive that contains XML and media components.
• Standards compliance: Conforms to ISO/IEC 29500 and ECMA 376 guidelines.
• Software support: Native to applications like Microsoft Excel and compatible with other spreadsheet software.
• Related formats: It belongs to the same family as DOCX and PPTX which handle word processing and presentation files respectively.

Though similar in packaging to these files, this specific MIME type is tied to spreadsheet data. It helps web servers and email programs recognize and process these files correctly during transfers.

Associated file extensions

.docx, .xlsx, .pptx

Usage Examples

HTTP Header

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

    Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.document
  

HTML

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

    <a href="file.dat" type="application/vnd.openxmlformats-officedocument.spreadsheetml.document">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.openxmlformats-officedocument.spreadsheetml.document');
      res.end('Content here');
    }).listen(3000);
  

Associated file extensions

.docx, .xlsx, .pptx