Skip to main content
Regulatory Council
a promotional graphic telling you that PCI Compliance is no longer an annual exercise and that continuous monitory must be built in
Category: GRC Governance Frameworks

Informative Reference

Also known as: Reference
Simply put

An Informative Reference is a pointer to a specific section of an existing standard, guideline, or set of practices that relates to a given cybersecurity activity or outcome. Rather than creating new requirements, it directs organizations to more detailed technical guidance found in other recognized sources. In the context of the NIST Cybersecurity Framework, these references help organizations connect the Framework's outcomes to practical, established methods for achieving them.

Formal definition

In the NIST Cybersecurity Framework, an Informative Reference is a component of the Framework Core consisting of citations to specific sections of standards, guidelines, and practices common among critical infrastructure sectors that illustrate methods to achieve the outcomes associated with a given Subcategory. NIST describes these as more detailed technical references intended to help organizations implement Framework outcomes by mapping them to related activities in other standards or guidelines. NIST maintains a catalog of such mappings through its Online Informative References (OLIR) program. More broadly, standards bodies such as ETSI distinguish informative references, which assist the user with regard to a particular subject area, from normative references, which are binding for conformance; Informative References in this sense are typically supplementary and non-binding rather than mandatory requirements. Applicability and the specific content of any referenced standard vary by sector, framework edition, and jurisdiction, and practitioners should consult the primary source documents directly.

Why it matters

Cybersecurity frameworks such as the NIST Cybersecurity Framework are deliberately outcome-oriented: they describe what an organization should achieve without prescribing the exact technical steps to get there. This design keeps the framework broadly applicable across sectors and organization sizes, but it can leave practitioners asking how, concretely, to satisfy a given outcome. Informative References fill that gap by pointing to specific sections of existing standards, guidelines, and practices that illustrate established methods for achieving Framework outcomes, so teams do not have to reinvent technical approaches from scratch.

For compliance and risk functions, this matters because it links high-level governance objectives to detailed, recognized guidance already in use across critical infrastructure sectors. Rather than treating the Framework as an isolated obligation, organizations can trace each outcome to related activities in other sources, supporting more consistent implementation and clearer internal documentation of how controls map to recognized practices. NIST maintains these mappings through its Online Informative References (OLIR) program, giving practitioners a catalog to draw on.

It is important to understand what Informative References are not. As bodies such as ETSI distinguish, informative material assists the user with a subject area but is typically supplementary and non-binding, in contrast to normative references, which are binding for conformance. Treating an Informative Reference as a mandatory requirement can distort an organization's compliance posture, and the content of any referenced standard varies by sector, framework edition, and jurisdiction. Practitioners should consult the primary source documents directly rather than relying on the pointer alone.

Who it's relevant to

Compliance Officers
Compliance officers use Informative References to connect framework outcomes to recognized standards and guidelines, supporting documentation of how internal practices map to established methods. Because these references are typically supplementary and non-binding rather than mandatory requirements, compliance teams should be careful not to treat them as binding obligations and should verify applicability against primary sources for their sector and jurisdiction.
Cybersecurity and Risk Practitioners
Practitioners implementing the NIST Cybersecurity Framework rely on Informative References to translate outcome-oriented Subcategories into concrete, established technical approaches drawn from other standards and guidelines. The OLIR catalog helps them locate references relevant to their environment, though the current content of any referenced source should be confirmed directly.
Sector-Specific Programs
Organizations in critical infrastructure sectors, such as health care, benefit from Informative References and sector-focused resources within the OLIR catalog that map Framework outcomes to standards common in their field. Applicability and referenced content vary by sector and framework edition, so program owners should tailor their selection accordingly.
Internal Auditors
Internal auditors can use Informative References to understand the recognized practices an organization has aligned to when pursuing Framework outcomes, aiding assessment of implementation consistency. Auditors should distinguish these non-binding references from any normative or regulatory requirements when scoping their reviews.

Inside Informative Reference

Mapping to a Framework Element
An Informative Reference typically links a specific requirement, control, or practice from an external source to a corresponding element of a framework, such as a NIST Cybersecurity Framework subcategory. It functions as a cross-reference rather than as a standalone requirement.
Source Standard or Publication
The referenced material generally originates from an established standard, guideline, or control catalog (for example, ISO standards, NIST Special Publications, or industry-specific guidance). The reference points to that source rather than restating its full content.
Illustrative, Non-Mandatory Nature
In many frameworks, Informative References are offered as examples or supporting guidance to help implementers operationalize an outcome. They are typically illustrative and non-exhaustive, and are not themselves the binding obligation.
Version and Edition Context
Because both frameworks and their referenced sources evolve across editions, an Informative Reference is tied to particular versions. The relevance and accuracy of a mapping can change as either the framework or the referenced standard is revised.

Common questions

Answers to the questions practitioners most commonly ask about Informative Reference.

Is an Informative Reference a mandatory requirement that an organization must implement?
No. An Informative Reference is not itself a binding obligation. In frameworks such as the NIST Cybersecurity Framework, Informative References are illustrative mappings that point to specific sections of standards, guidelines, or practices that can help achieve a given outcome. They are offered as supporting guidance rather than as prescriptive mandates, and their applicability depends on the organization's sector, jurisdiction, and risk profile. Whether any referenced control becomes obligatory typically derives from a separate legal, regulatory, or contractual source, not from its status as an Informative Reference.
Does an Informative Reference define the framework's own requirements or outcomes?
No. An Informative Reference points outward to external documents; it does not establish the framework's outcomes. The distinction matters: the framework's own elements (for example, its categories, subcategories, or desired outcomes) express what is to be achieved, while Informative References indicate where existing standards or practices may help achieve it. Treating a reference as though it were the outcome itself can conflate the goal with one possible means of reaching it. Framework language and the referenced sources also evolve across editions, so the mapping should be understood as a snapshot rather than a permanent equivalence.
How should we decide which Informative References to apply within our organization?
Selection is typically driven by relevance to your objectives, sector, and risk profile rather than by attempting to apply every reference. Many organizations begin by identifying the framework outcomes most material to their context, then review the associated Informative References to see which point to standards they already use or are obligated to follow. Because references are illustrative, professional judgment is needed to determine fit, and legal or regulatory obligations should be confirmed against the primary sources rather than inferred from the mapping alone.
How do we keep Informative References current as standards change?
Because both frameworks and the documents they cite are revised over time, mappings can become outdated. A common practice is to periodically verify each reference against the current edition of the underlying standard and against the current version of the framework, since section numbering and content may change across editions. Assigning ownership for this review and recording the version consulted can help maintain traceability. Where a precise clause or edition matters for a decision, it should be checked against the primary source.
Can Informative References be used to demonstrate compliance to regulators or auditors?
Informative References can help illustrate how chosen practices relate to recognized standards, but on their own they typically do not constitute evidence of compliance. Demonstrating compliance generally requires showing that specific controls were designed, implemented, and operating, mapped to the actual obligation in question. A reference may support such an account by connecting an outcome to a familiar standard, yet auditors and regulators usually look to the underlying evidence and to the binding requirement itself. Where regulatory acceptability is uncertain, professional advice specific to the jurisdiction and sector is appropriate.
How do Informative References relate to the controls we already have in place?
Informative References often serve as a bridge between framework outcomes and an organization's existing control set. Where a referenced standard is one the organization already follows, the mapping can help show how current controls support a framework outcome, potentially reducing duplication. It is important to remember that a reference points to a means of modifying risk, not to the risk or the outcome itself, so mapping controls to references is a way of organizing and evidencing existing measures rather than a substitute for assessing whether those controls are adequate for the organization's objectives.

Common misconceptions

An Informative Reference is a mandatory control that must be implemented as written.
Informative References are typically illustrative and supporting in nature. They point practitioners toward standards or practices that may help achieve a framework outcome, but they are generally not themselves binding requirements. Whether an underlying obligation is mandatory depends on applicable law, contract, or the organization's own policy, not on the reference itself.
Mappings between a framework element and an Informative Reference are exact, one-to-one equivalences.
Mappings are often approximate and context-dependent, reflecting a relationship or partial correspondence rather than perfect equivalence. A single framework element may reference multiple sources, and the fit can vary by edition, so mappings should be treated as guidance to be validated rather than as definitive equivalents.
Informative References remain valid indefinitely once published.
Both frameworks and the sources they reference are periodically revised. A reference that was accurate for one edition may become outdated, superseded, or misaligned over time, so version context and currency should be verified against the primary sources.

Best practices

Treat Informative References as supporting guidance, and separately determine whether any underlying obligation is binding based on applicable laws, regulations, contracts, or internal policy.
Verify each reference against the current edition of both the framework and the referenced source, and record the specific versions relied upon.
Validate mappings for actual fit rather than assuming one-to-one equivalence, and document where a reference only partially addresses a framework element.
Consider multiple relevant references where a single source does not fully cover an outcome, recognizing that reference lists are often non-exhaustive.
Establish a periodic review cycle to reassess references as frameworks and standards evolve, updating internal documentation accordingly.
Where applicability is uncertain or turns on legal interpretation, flag the matter for review by appropriate professional or legal advisors rather than relying on the reference alone.
Application Security Isn’t Optional Anymore.