What question did this study set out to answer?

To update the Structural Reference Framework (SRF) for visible-body interpretation and clarify the distinct operational branches related to body-related outputs.

June 20, 2026Open Access

The Reference Branch Map for Visible-Body Interpretation v0.2: A Structural Reference Framework Update for BPI-R6, Reference Concordance, Dual-View Representation, and SFT-5

Key Points

To update the Structural Reference Framework (SRF) for visible-body interpretation and clarify the distinct operational branches related to body-related outputs.
Introduced a Reference Branch Map organizing outputs into five major reference branches: Mass, Body-Composition, Regional Anthropometric, Visible-Body, and Longitudinal.
Separated the Visible-Body Reference into Relational-Proportion and Structural-Flow branches to highlight their distinctions.
Included no new empirical dataset, but positioned public companion records within the updated structure.
Clarified the roles of BPI-R6 and SFT-5, showing they are adjacent yet distinct structures without direct conversion.
Established a clear framework for interpreting visible-body outputs based on selected reference branches without introducing new evaluations or diagnostics.

Abstract

This record provides v0.2 of the Structural Reference Framework (SRF) as an operational Reference Branch Map for visible-body interpretation. The parent SRF record is: Kang S. Observation Is Not Interpretation: Structural Reference Framework for Visible-Body Interpretation. Zenodo. 2026. doi:10.5281/zenodo.20457623 This v0.2 update preserves the core SRF principle that observation and interpretation are distinct operations. A body-related output does not become meaningful simply because it is measured, recorded, photographed, classified, or displayed. It becomes interpretable only when the reference condition through which it is being read is made explicit. The central contribution of this update is the Reference Branch Map. The map organizes body-related outputs into five major reference branches: Mass Reference Body-Composition Reference Regional Anthropometric Reference Visible-Body Reference Longitudinal Reference The main update concerns the Visible-Body Reference branch. This version separates Visible-Body Reference into two sub-branches: Relational-Proportion BranchThis branch includes BPI, BG-10, BPI-R6, BPI-R6 Reference Concordance, and BPI-R6 Dual-View Representation. Structural-Flow BranchThis branch includes SFT-5. This separation clarifies that BPI-R6 and SFT-5 are adjacent but distinct visible-body reference structures. BPI-R6 preserves continuous relational-proportion structure, while SFT-5 provides a typological language for dominant visible structural silhouette flow. SFT-5 should not be treated as a direct conversion of BPI-R6, and BPI-R6 should not be treated as an automatic SFT-5 classifier. This update does not create a new score, diagnostic system, body-type hierarchy, interpretation engine, or implementation procedure. SRF does not itself compute, classify, rank, diagnose, or evaluate the body. Its role is to identify the reference branch through which a body-related output should be interpreted. This record also positions the following public companion records within the updated visible-body reference structure: Kang S. BPI-R6 Public Technical Definition v0.1: A Six-Coordinate Relational Profile for Visible Body-Proportion Representation. Zenodo. 2026. doi:10.5281/zenodo.20731035 Kang S. BPI-R6 Reference Concordance Framework v0.1: A Reference-Relative Six-Coordinate Representation for Visible Body-Proportion Profiles. Zenodo. 2026. doi:10.5281/zenodo.20731442 Kang S. BPI-R6 Dual-View Representation Architecture v0.1: A Linked Reference-Neutral and Reference-Relative Representation for Visible Body-Proportion Profiles. Zenodo. 2026. doi:10.5281/zenodo.20731854 Kang S. SFT-5 Public Definition Canon v0.1: A Five-Type Structural Silhouette Flow Framework for Visible-Body Observation. Zenodo. 2026. doi:10.5281/zenodo.20734237 No new empirical dataset is introduced in this record. Invitation for Scholarly Dialogue Questions, brief comments, critical perspectives, and informal scholarly conversations are all welcome. Researchers and practitioners who find any part of this work relevant to their own interests are warmly invited to contact the author. You do not need to have read the entire framework, developed a formal position, or prepared a collaboration proposal. Partial impressions, preliminary questions, and brief messages are equally welcome. Contact: Sarang KangEmail: corsetmuscle@gmail.com Keywords: Human Aesthetic Engineering; HAE; visible human form; visible-body interpretation; intersection framework; cross-domain coordination; domain-specialized framework; anthropometry; body scanning; computer vision; sports science; Human–Computer Interaction; Human–Data Interaction; human–machine systems; digital health; personal informatics; technological representation; reference selection; relational organization; contextual interpretation; longitudinal interpretation; interpretation boundaries; evidence-limited inference; responsible interpretation; BPI-R6; Body Proportion Index; body proportion; visible body shape; relational measurement; six-coordinate profile; multidimensional representation; body-data representation Version:v1.1.0 — Public Concept Note / Working Paper

The Reference Branch Map for Visible-Body Interpretation v0.2: A Structural Reference Framework Update for BPI-R6, Reference Concordance, Dual-View Representation, and SFT-5

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