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Glossary · Registers & filings

XBRL and iXBRL, explained.

The SEC requires XBRL tagging of financial statements in periodic reports and publishes the tagged figures as “company facts”.

The short answer

XBRL (eXtensible Business Reporting Language) is a standard for tagging financial-statement figures so software can read them reliably. Inline XBRL (iXBRL) embeds those tags inside a human-readable document, so the same file serves people and machines.

At a glance

Term
XBRL and iXBRL
Also known as
XBRL · Inline XBRL · iXBRL accounts
Category
Registers & filings
Where it matters
Company and founder due diligence

XBRL and iXBRL in practice

The SEC requires XBRL tagging of financial statements in periodic reports and publishes the tagged figures as “company facts”. UK Companies House accepts accounts in iXBRL, and the EU’s ESEF format uses iXBRL for listed issuers’ annual financial reports.

Why XBRL and iXBRL matter

  • Figures come straight from the filing, not from a re-keyed database.
  • The same concept (revenue, net income) can be compared across companies.

XBRL and iXBRL in MarketPrior

MarketPrior reads reported figures from SEC XBRL company facts, ESEF annual financial reports and national registries such as Companies House iXBRL accounts and Norway’s annual-accounts register, and cites each figure to its filing.

FAQ

Frequently asked questions

Do private companies file XBRL?
In the US, generally not. In the UK, many companies file accounts with Companies House in iXBRL, though small companies file limited accounts.
What is the difference between XBRL and iXBRL?
XBRL is the tagging standard; iXBRL embeds the tags in an HTML document that people can read normally.

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