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Topic Map Query Language (TMQL) is a specific XML-based language
protocol that is based on the popularity of structured query language (SQL).
SQL was developed for a relational database, to allow robust searches of a
database by users. Topic Map Query Language was made for topic maps, which are
much more dynamic and have specific data structures.
Techopedia Explains Topic Map Query Language
As an element of semantic web technology, topic maps are
constantly changing. Topic Map Query Language has to be able to go in and get
data from these maps effectively. Topic Map Query Language uses two specific
processes – one is information retrieval, and the other is information
filtering. Through these combined approaches, Topic Map Query Language allows
for data mining and related processes that apply to the topic map, where
conventional SQL is applied to the relational database.
