Which MIME types are related to file extension ".acsm"?
The .acsm file extension is associated with 1 MIME types:
application/vnd.adobe.adept+xml.
A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.
About .acsm Files
ACSM files are files used by Adobe’s Content Server Message system to manage secure ebook downloads.
They use the MIME type application/vnd.adobe.adept+xml and are written in XML. They do not contain the ebook itself but act as a key to download the actual content.
When you open an ACSM file with apps like Adobe Digital Editions, it verifies your license and fetches the protected ebook (often in PDF or EPUB format).
- Purpose: They authorize and trigger the download of DRM-protected ebooks.
- Usage: Provided by online ebook retailers to ensure content is accessed securely.
- Format: XML-based message files, not standalone ebook files.
- Software: Typically opened with Adobe Digital Editions and similar DRM-enabled applications.
Relationship between file extension and MIME type
A file extension is a suffix at the end of a filename that indicates what type of file it is. File extensions help both users and operating systems identify what application should be used to open the file.
File extensions are typically separated from the filename by a period (dot) and consist of 2-4 characters, though they can be longer. For example, in the filename "document.pdf", ".pdf" is the file extension.
File extensions are closely related to MIME types, as they both serve to identify the format of a file. However, while MIME types are used primarily by web browsers and servers, file extensions are used by operating systems and applications.
Associated MIME types
application/vnd.adobe.adept+xml
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 can one extension have multiple MIME types?
Different programs and historical usage may assign various MIME identifiers to the same file format. Listing them together helps maintain compatibility across tools.