By INSPIRE interpretation, metadata present data about data, i.e. an information describing spatial data and electronic services. Contains information about spatial data and electronic services content, category, property, format, data creation and processing methods, spatial areal, quality, terms of their use, restrictions and other specifications, that is necessary for users and presents essential component of the National Spatial Data Infrastructure.
Metadata allow: to fulfill searching process without touching the data, to identify documented spatial data and electronic services with required and sufficient quality of detailing, to evaluate compatibility of different structure data when exchanging an information, that reveals new opportunities for unified processing and integration of data and software. In case of restrictions or fee for data, there is a record in metadata about it. Metadata are also used in the process of cataloging, registration, statistical processing and analysis.
Metadata forming rules are regulated by International standards ISO, OGC, INSPIRE and others.