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DataEngBytes 2023 - PER-T1-11 - Mark Kitson

on YouTube 32m
Talkat DataEngBytes Perth 2023 · on Tuesday, 2023-08-22· [data-engineering, large-language-models]

speaker

name:Mark Kitson
links:none on file

resources

video:https://youtu.be/SO2KY8URln8
slides:none on file

summary

Argues that a semantic layer is a linked set of business and technical definitions that prevents costly misinterpretation, supports governance, and connects metrics to sources; recommends using SKOS/RDF and knowledge graph tech, linking LLMs to structured knowledge to contain hallucination risk, and keeping a slim metrics layer built from agreed terms. Cites implementations (proof‑of‑concept at a major UK bank, integrations with dbt/Looker, thousands of apps) that revealed hidden dependencies and produced actionable alignment.

AI-written summary · about

chapters (17)

  1. 0:00Introduction
  2. 2:11Cost of miscommunication in data
  3. 4:00Defining the semantic layer
  4. 6:07Data quality pyramid
  5. 8:56Illusion of understanding in data
  6. 11:05Semantic layer enables connections
  7. 14:14Semantic layer vs data modeling
  8. 16:24Importance of common language
  9. 18:51Respecting tribal dialects
  10. 19:13Right level of definition specificity
  11. 21:20Aligning definitions in stages
  12. 23:28Using SKOS and semantic tech
  13. 25:15Structured knowledge vs LLMs
  14. 26:39Linking LLMs to structured knowledge
  15. 27:21Semantic layer in impact sandwich
  16. 29:47Hiding complexity from users
  17. 31:34Recap and closing remarks

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