DROID (Digital Record Object Identification)

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DROID (Digital Record Object Identification) is a software tool developed to perform automated batch identification of file formats.
License:BSD License
Platforms:Java 6 Standard Edition
Input Formats:PREMIS (Preservation Metadata Implementation Strategies)
Function:File Format Identification,Metadata Extraction
Appears in COW:Creating a SIP from content downloaded from OneDrive (or other Cloud based source), Digital archiving workflow (high-level), Ingest and AIP creation, LAC Pre-Ingest Workflow, Workflow for ingesting digitized books into a digital archive


DROID (Digital Record Object Identification) is a software tool developed to perform automated batch identification of file formats. DROID is designed to meet the fundamental requirement of any digital repository to be able to identify the precise format of all stored digital objects, and to link that identification to a central registry of technical information about that format and its dependencies.

DROID uses the PRONOM signature files to perform format identification. Like PRONOM, it was developed by the National Archives of the UK. Written in Java, XML.


The format information held in PRONOM is what powers DROID (Digital Record Object Identification). Both are maintained by the UK's National Archives.

DROID downloads the latest signature files from PRONOM, and those are used to drive the identification process. See the PRONOM release notes.

A number of other tools and registries have been based around the PRONOM data. These include:

Although the information and website are made freely available under the Open Government License, the underlying software engine that powers PRONOM is proprietary.

The PRONOM Web API[edit]

The website is oriented towards manual browsing, but note that each PRONOM registry entry as a permalink, like this:


and furthermore, by appending '.xml' to the URL for any entry, the data can be recovered as XML:


User Experiences[edit]

Development Activity[edit]

All development activity is visible on GitHub: http://github.com/digital-preservation/droid/commits

Release Feed[edit]

Below the last 3 release feeds:

2023-09-11 13:43:58
[tag:github.com,2008:Repository/4737996/droid-6.7.0 6.7.0 Release]
by sparkhi
2023-08-31 11:34:49
[tag:github.com,2008:Repository/4737996/droid-6.7.0-RC5 6.7.0 Release Candidate 5]
by sparkhi
2023-08-17 11:57:20
[tag:github.com,2008:Repository/4737996/droid-6.7.0-RC4 6.7.0 Release Candidate 4]
by sparkhi

Activity Feed[edit]

Below the last 5 commits:

2024-02-21 12:04:32
[tag:github.com,2008:Grit::Commit/216cdb1d6231ce3b05486ddb6c9b7e5e0251d3e0 Made the org.tukaani dependency explicit (#1070)]
by sparkhi https://github.com/sparkhi
2024-01-29 12:00:12
[tag:github.com,2008:Grit::Commit/3071273f236f075641d39818d6b5e75d4828c078 Issue 1011 format name difference between api and UI (#1064)]
by sparkhi https://github.com/sparkhi
2024-01-22 14:17:08
[tag:github.com,2008:Grit::Commit/6f0a6b1846827065a83a09a69bb225a8e9689020 build(deps): bump org.apache.maven.plugins:maven-compiler-plugin (#1055)]
by dependabot https://github.com/dependabot
2024-01-22 11:22:22
[tag:github.com,2008:Grit::Commit/ab11872e371f6bf67b80f25a539d2adcd1dcd294 Add CLI examples to README (#1056)]
by marhop https://github.com/marhop
2024-01-22 10:12:49
[tag:github.com,2008:Grit::Commit/d9adfcbc795f85f86286a24321dafdbf407cf774 Updated to use 64 bit JRE (#1058)]
by sparkhi https://github.com/sparkhi

About Formats[edit]

DROID do only read the format itself, not the spesification as such