The Unified State Open Data Web Portal was established to comply with the Law of Ukraine "On Access to Public Information" and Resolution of the Cabinet of Ministers of Ukraine No. 835, dated October 21, 2015, which approved the Regulation on Data Sets to be Disclosed in the Form of Open Data.

The main purpose of the portal is to provide access to public information in the form of open data and facilitate its subsequent use.

Public information in the form of open data can be freely copied, published, distributed, and utilized by anyone, including for commercial purposes, as long as proper attribution to the information source is given.

The objectives of the portal include:

• Ensuring the timely publication of information that must be disclosed by authorities, as well as any other data that meet the definition of public information, in the form of open data.
• Publishing and regularly updating open data on the portal by the information manager.
• Establishing common rules for all users regarding the publication of information materials as open data.
• Ensuring the prompt publication of complete and accurate information.
• Providing effective communication channels for bilateral communication and feedback.

Requirements for the structure of data sets published on the portal:

The structure of the data sets published on the portal should include a description of the composition, format, parameters, and purpose of the data set. The structure of the open data set is typically published in formats such as XSD, JSON, CSV, or similar.

The portal supports various data formats for publishing datasets:

Data type	Data format
Text data	TXT, RTF, ODT*, DOC(X), PDF (with text content, non-scanned image), (X)HTML*
Structured data	RDF*, XML*, JSON*, CSV*, XLS(X), ODS*, YAML*
Graphic data	GIF*, TIFF, JPG (JPEG)*, PNG*
Video data	MPEG, MKV, AVI, FLV, MKS, MK3D
Audio data	MP3, WAV, MKA
Data developed with Macromedia Flash program	SWF, FLV
Data archive	ZIP*, 7z*, Gzip*, Bzip2*
Geospatial data	GeoTIFF, SHP, DMF, MID/MIF, DXF, ХML, GeoJSON, GPX, LOC, ARINC, AIXM.

The Ministry of Digital Transformation of Ukraine is responsible for creating and operating the unified state open data web portal.