ENTS – Extendable Nested Tagging Schema

The Extendable Nested Tagging Spec, or ENTS, is an implementable specification for writing human-readable nested tagging structures for file systems.

Specification

• ENTS 0.5.0
• Haskell Parser
  • This verison of the parser is also supported. The main parser is written in Rust

Implementations

• PRLENTS (PRototype Rust LENTS)
  • cargo install --git https://github.com/diegocabello/prlents
  • Documentation
  • Github

Roadmap and Implementations

The PRLENTS implementation for file tagging managment, written entirely in Rust, was released in June 2025. In the future, ENTS is planned to be used for improved academic taxonomies for research paper databases; potentially as a configuration language; and for a FUSE nested tagging filesystem.