DITA is an open standard to structure documentation and is therefore often used in technical writing.
It stands for “Darwin Information Typing Architecture”.
DITA was originally developed by IBM but since 2005 it is defined and maintained by OASIS, a non-profit consortium comprised of members from the technology industry, users and influencers.
DITA and structured authoring are closely related. The first three DITA features are also structured authoring features.
As DITA is an open standard, you can consult the DITA specifications for free on the internet: