Authority Industries Network: How the Domains Connect
The Authority Industries Network is a structured system of purpose-built web domains, each assigned to a specific industry vertical or functional role within a national directory infrastructure. This page explains how those domains relate to one another, what principles govern their structure, and where one domain's scope ends and another's begins. Understanding the network's architecture helps researchers, businesses, and directory users locate the right resource for a given industry or information need.
Definition and scope
The Authority Industries Network operates as a hub-and-spoke directory model spanning multiple industry verticals across the United States. At the center sits a coordinating hub — National Vertical Authority — that establishes the classification logic, editorial standards, and quality signals applied consistently across all affiliated domains. Each spoke domain is a dedicated reference property assigned to a single vertical, such as legal services, healthcare, construction, or financial services.
Scope is defined along two axes: geographic reach and subject depth. Every domain within the network operates at national scope, meaning listings and reference content are not restricted to a single city, county, or state. Subject depth is vertical-specific; a domain assigned to the construction trades covers licensing tiers, contractor categories, and trade-specific compliance frameworks, while a domain assigned to healthcare covers provider types, credentialing bodies, and facility classifications. The multi-vertical directory structure separates these domains deliberately to prevent cross-contamination of classification standards between dissimilar industries.
The network does not function as a single monolithic website. It is a coordinated set of distinct domains, each with its own editorial identity, linked by shared vetting criteria and a common data governance framework.
How it works
The domain assignment process begins with vertical identification. Each industry vertical recognized by the network is evaluated against four criteria before a dedicated domain is commissioned:
- National addressable scope — the vertical must have practitioners, facilities, or entities operating across at least 20 U.S. states to qualify for national-scope treatment rather than regional coverage.
- Distinct classification logic — the vertical must require a classification taxonomy that does not map cleanly onto an existing assigned domain.
- Reference demand — documented public or professional need for a centralized directory in that vertical, distinct from commercial listing platforms.
- Editorial separability — the vertical's compliance, licensing, and credentialing standards must be independently verifiable through named public bodies (federal agencies, state licensing boards, accreditation organizations).
Once a vertical meets those criteria, a domain is assigned through the process described in how authority domains are assigned. The hub domain does not host vertical-specific listings directly; it routes users to the appropriate spoke domain and maintains the master directory listing categories taxonomy that spoke domains inherit.
Data sourcing across all domains draws on public records: state licensing databases, federal agency registries, and accreditation body rosters. The authority industries data sources page details which source types are authorized at each data tier.
Common scenarios
Scenario 1 — A user researching a licensed contractor.
A property owner looking for a licensed general contractor in Nevada would access the construction vertical's spoke domain, not the hub. The spoke domain holds contractor license numbers, license class designations, and disciplinary records sourced from the Nevada State Contractors Board. The hub domain would not surface that record directly.
Scenario 2 — A researcher mapping coverage gaps.
A policy researcher assessing which industry verticals lack national-scope reference directories would consult national vertical coverage gaps to identify verticals that are recognized but not yet assigned a fully operational spoke domain.
Scenario 3 — A business verifying its own listing.
An entity seeking to correct or update its directory entry does not contact the hub. The process runs through the spoke domain that hosts the record, following the workflow described in updating or correcting a listing.
Decision boundaries
The network draws a clear distinction between hub functions and spoke functions, and between sibling domains operating within the same network tier.
Hub vs. spoke: The hub domain sets policy, taxonomy, and quality standards. It does not originate industry-specific listings. Spoke domains execute those standards within a defined vertical and hold the actual reference records. A user looking for policy rationale consults the hub; a user looking for a specific licensed entity consults the appropriate spoke.
Spoke vs. spoke: Two spoke domains may cover adjacent industries — healthcare and behavioral health, for example — but each maintains a separate classification system derived from the distinct licensing and credentialing frameworks governing those fields. The how sibling domains differ from hub page details the boundary conditions where adjacent verticals require separate domains rather than shared taxonomy nodes.
National vs. local scope: The network does not replicate local or municipal directory functions. Entities operating in a single metropolitan area or below a 20-state presence threshold are addressed in the national vs. local authority directory distinctions framework, which explains why hyperlocal listings fall outside the network's editorial mandate.
The decision to assign a new domain, merge two adjacent verticals under one spoke, or retire an underperforming domain follows criteria documented in the authority industries editorial policy. No domain is commissioned or decommissioned outside that documented process.
References
- U.S. Small Business Administration — Business Licenses and Permits
- National Council for Interior Design Qualification (NCIDQ) — Licensure by State
- Federation of State Medical Boards — Physician Data Center
- U.S. Department of Labor — Licensing Database
- National Center for Education Statistics — Accreditation in the U.S.