[4] The Internet Archive also developed many of its own tools for collecting and storing its data, including PetaBox for storing large amounts of data efficiently and safely, and Heritrix, a web crawler developed in conjunction with the Nordic national libraries.
[5][6] From 2001 to 2010,[failed verification] the International Web Archiving Workshop (IWAW) provided a platform to share experiences and exchange ideas.
[3] This project developed and released many open source tools, such as "rich media capturing, temporal coherence analysis, spam assessment, and terminology evolution detection.
For example, in 2017, the United States Department of Justice affirmed that the government treats the President's tweets as official statements.
They also archive metadata about the collected resources such as access time, MIME type, and content length.
Also, the Web is changing so fast that portions of a website may suffer modifications before a crawler has even finished crawling it.
This is typically done to fool search engines into directing more user traffic to a website and is often done to avoid accountability or to provide enhanced content only to those browsers that can display it.
For instance, academic archiving by Sci-Hub falls outside the bounds of contemporary copyright law.