Best
The following is a summary of the best versions of the Seattle Method resources. Note that there has been no change between the original Seattle Method and Seattle Method 1.1; the only difference is the physical location of the files.
Best Version of Seattle Method
These are the best versions of the Seattle Method which have been rigorously tested and are in use: (tested using Arelle, UBmatrix XPE 4.0, Pesseract, Coyote Reporting, Auditchain Pacioli, Auditchain Luca Suite)
- Github: Seattle Method 1.1 Documentation | Framework Documentation | Files (Very good)
- Azure: Seattle Method 1.1 Documentation | Framework Documentation | Files (Very good testing, more reliable and secure web server)
- XBRL Site: Seattle Method Documentation | Framework Documentation | Files (Thoroughly tested, less reliable web server which is HTTP rather than HTTPS)
Implementations
The following are implementations that make use of the Seattle Method:
- Clawdog (Lodgeit)
- Robosystems.ai
- mrtimo; statement-explorer | FAC Model | Interactive Explorer
- Pacioli (Auditchain)
- Luca Suite (Auditchain)
- Pesseract (Working proof of concept)
- All off-the-shelf XBRL Software that are fully compliant XBRL processors (support Seattle Method at the technical syntax level, not necessarily the financial reporting logic level)
Best Working Proof of Concepts and Examples
These are the best locations of working proof of concepts and examples:
Fundamental Accounting Concepts (FAC)
The fundamental accounting concepts (FAC) was the starting point of the Seattle Method and there are multiple different implementations with different pros and cons. (See this background information.)
- Original 2015 Version: This version has good documentation. Used by XBRL Cloud, was not pure XBRL because it used an older impute rule format. This approach has been abandoned.
- Working Proof of Concept, V3 2016 Version: Highest quality rules, all rules are 100% XBRL; however an inferior impute rule format was used which was not optimal. But this rule quality is good.
- Auditchain Proof of Concept: This is a proof of concept created but never used. Has some good ideas.
- Auditchain Working Proof of Concept: This set of rules was used to verify the DOW 30 and Fortune 100 in 2022. Here is human readable version. (*** BEST VERSION ***)
- High Quality Working Proof of Concept 2024: This is a high quality working proof of concept that has been rigorously tested, but it only works for one reporting style (the most common reporting style).
- Proof of Concept Seattle Method: Proof of concept, has not been tested. US GAAP and IFRS.
- FAC-US GAAP-Viewer:
- FAC-IFRS-Viewer:
- FAC-Universal-Viewer:
- Universal Working Proof of Concept
Mappings:
Types and Subtypes (i.e. Categories and Elements)
These are proof of concepts for type-subtype (a.k.a. wider-narrower, categories and elements) for US GAAP and IFRS:
- IFRS Full Types and Subtypes: (xbrlsite)
- US GAAP Types and Subtypes: (xbrlsite)
- US GAAP Types and Subtypes: (Azure)
Disclosures and Disclosure Mechanics
These are proof of concepts and working proof of concepts for specifying disclosures and disclosure mechanics rules:
- US GAAP Disclosures: About 1000 disclosures.
- US GAAP Disclosure Mechanics Rules: Disclosure mechanics rules for disclosures provided by Microsoft; about 130.
- Older US GAAP Disclosures: Proof of concept US GAAP, about 1000 disclosures.
- Older IFRS Disclosures: Proof of concept for IFRS FULL,
Reporting Checklist
These are proof of concepts for reporting checklists:
Key Performance Indicators (KPIs)
Other Prototypes and Miscellaneous Resources
- Accounting Oracle Machine (See Prototye2 Section)
- Real Numbers (Standard Costing; Activity Based Costing)
- Elements of Financial Statement, Comparison Across Reporting Frameworks
- AASB1060
- PROOF (Comparison)
- ESEF/ESMA 2025 XBRL Taxonomy
- FASB US GAAP XBRL Taxonomy
- Digital Financial Reporting Github Repository
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