Parameterized attribute engine for the Fosferon ecosystem.

AttrEngine provides a schema-driven content modelling system with:

• Attributes — structural primitives (text, asset, select, boolean, etc.)
• AttributeSets — named groups of attributes forming a reusable shape
• ASA (AttributeSetAttribute) — join table carrying semantic identity and config overrides
• ASD (AttributeSetData) — JSONB content instances with per-instance overrides
• 4-layer config cascade — Attribute defaults → ASA overrides → ASD instance → runtime enrichment
• DAG composition — AttributeSet trees with includes/extends/overrides
• Multilingual resolution — field-level locale maps with strict/fallback modes
• Pluggable rendering — HTML, JSON envelopes, or custom output

Configuration

config :attr_engine,
  repo: MyApp.Repo,
  table_prefix: nil  # optional, e.g. "cms_" or "ac_"

Quick start

# Generate migrations
mix attr_engine.gen.migration

# Use schemas
alias AttrEngine.Schema.{Attribute, AttributeSet, AttributeSetData}

# Resolve locale
AttrEngine.Locale.resolve(data, "el", default_locale: "en", mode: :fallback)

# Render a block
AttrEngine.Render.render_block(block_type_handle, data, locale)