In this article, the author discusses the importance of optimizing data element definitions to work with Language Learning Models (LLMs) in knowledge graphs. The ISO/IEC 11179 Metadata Registry (MDR) guidelines are used as a basis for creating precise, concise, distinct, noncircular, and unencumbered definitions that can be easily understood by LLMs. These definitions should focus on the semantics or meaning of data elements while also considering their representation in terms of data types. The article provides examples of vertex attributes and enumerated values with clear definitions following ISO 11179 standards.