noun-modifying (irregular)
systematic; structured; organized
Describes knowledge, information, or a body of work that is coherently organized into a system. Used prenominally (before a noun).
He has systematic knowledge.
This book provides structured information.
Standard spelling; the past-tense form of 体系立つ used prenominally.
Alternate kanji spelling using 立つ; less common but still encountered.
From 体系 (system) + 立つ (to stand, to be established) in its past tense form だった, used as a prenominal modifier. The literal sense is 'having stood as a system', i.e., 'systematized'.