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XBRL Abstract Model UpdatePWD 2.0 progress
(as of) 2012-05-31Herm Fischer, Dave Frankel, Warwick Foster (the 3
F’s)
Copyright ©2011-2012 XBRL International Inc., All Rights Reserved. This is an unpublished draft. Circulation of this draft is
restricted to participants in XBRL International and is not appropriate to cite from other sources.
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Topic
2009-2010 XSB survey and strategic plan, calls for abstract model
2011 Jan-Sep Chartered for: XBRL 2.1 & XDT PWD 1.0
2011 Oct Re-scoped: serve as basis for spec rewrites, training, APIs, include Formula, Rendering, …
2011 Nov-Dec Review: PWD 1.0 “too close to 2.1 syntax”
2012 Jan Leverage aspect modeling, data points, OLAP dimensions, table views, MOF meta-modeling
2012 Jan-May Working F2Fs in California & London
2012 April Discussions at OMG, Adaptive, IFRS, EBA
2012 June PWD 2.0
Steps to PWD 2.0
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Methodolgy◦ Early design based on forms, not data modeling◦ Data points modeling
Multiple aspect models of data points Isolates from local concept, dimension, view models
Formal metamodeling◦ Abstract model independent of syntax◦ Suitable for metadata repositories◦ Link to formal semantic definitions◦ Proof by instance modeling
Metadata and Data Modeling, Methodologies and Controversies
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Multi-extensions naming their own concepts, schedules (link roles) and dimensions
Dimensionality models◦ Alternate base item and dimensionality models◦ Issues of dimensionality for consumption (OLAP)
Comparability Mapping into BW/BI and OLAP
Issues encouraging adoption of CWM, data points, and aspects
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Technologies in use by XBRL: ◦ Formula Linkbase◦ Sphinx◦ Schematron◦ BI (Cundus, Felden)
Business rules for filings◦ Individual and small sets of instances
Analytics for consumption◦ Very large sets, OLAP and BI
Comparability
Business Rules and Analytics
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Model Topic
Primary Dictionary, data points, aspects models, valid combinations (cubes), views (tables), type model
Secondary XBRL 2.1 concrete syntax Instance, DTS, elements, concepts, and relationships dimensions, typing formula table and rendering
GL logical model
Charlie’s logical model (mapping)
Metadata repository (Adaptive, joint XII-OMG)
Consumption: via OLAP & BI
What’s in PWD 2.0
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1. Data dictionary2. Valid combinations3. Table4. Document5. Instance6. Typing7. DTS
Primary Model
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1. Data dictionaryAspect, Relationships, Resources
5. InstanceData points contextualized by aspect
models
2. Valid combinations Cubes, cube regions, abstract hypercubes
3. TableViews, table linkbase, rendering
6. TypingStructured data types, abstract XML
We will jump around key points
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A. Aspects and Aspect ModelsB. RelationshipsC. ResourcesD. Examples
1. Data Dictionary
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+refToSemanticVocabEntry : anyURI [0..1]
«Metaclass»Aspect
isAspectDefault : boolean [1]value : anyType [1]+refToSemanticVocabEntry : anyURI [0..1]
«Metaclass»AspectValue«Metaclass»
AspectValueRelationship
«Metaclass»AspectAspectValueRelationship
«Metaclass»AspectRelationship
relationshipKind : RelationshipKindorderNumber : decimal [0..1]
«Metaclass»Relationship
«Metaclass»AspectValueSet
«Metaclass»EnumerableAspect
«Metaclass»NonEnumerableAspect
«Metaclass»AspectModel
«Metaclass»DataType
{subsets relatedElement2}value
{subsets relatedElement1}aspect
0..*{subsets relatedElement2}
aspect2
1
0..*{subsets relatedElement2}
value2
1
0..*
{subsets relatedElement1}
value1
1
0..*
{subsets relatedElement1}aspect1
1
0..*
1
0..*
1
10..*
0..*
1..*
1A. Data Dict., Aspects Forms
aspect models
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1B. Data Dict., Relationships
isAspectDefault : boolean [1]value : anyType [1]+refToSemanticVocabEntry : anyURI [0..1]
«Metaclass»AspectValue
+refToSemanticVocabEntry : anyURI [0..1]
«Metaclass»Aspect
relationshipKind : RelationshipKindorderNumber : decimal [0..1]
«Metaclass»Relationship«Metaclass»
RelatableElement isDirected : boolean [1]allowsCycles : boolean [1]
«Metaclass»RelationshipType
«Metaclass»RelationshipSet
«Metaclass»DataPoint
role : string [0..1]content : anyType [0..1]
«Metaclass»Resource
NEAR_EQUIVALENCEUSER_DEFINED
EQUIVALENCEPART_WHOLE
SUBTYPESUBSET
«enumeration»RelationshipKind
1..*
{ordered}
0..*
0..* 1
relatedElement2
1 0..*
relatedElement1
1 0..*
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relationshipKind : RelationshipKindorderNumber : decimal [0..1]
«Metaclass»Relationship
«Metaclass»ResourceRelationship
«Metaclass»RelatableElement
role : string [0..1]content : anyType [0..1]
«Metaclass»Resource «Metaclass»
DataType{subsets relatedElement2}
10..*
relatedElement1
10..*
relatedElement2
10..*
1
type
0..*
1B. Data Dict., Resources
Labels, Documentation References Formula
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...
«Metaclass»Aspect
«Metaclass»DataPoint
«Metaclass»NonEnumerableAspect
«Metaclass»EnumerableAspect
...
«Metaclass»AspectValue
«Metaclass»AspectValueSet
/baseItem 1
0..*
0..* 1 0..* 1
context 1..*
0..*
dataPointValue1
0..*
5. Instances Data points are facts◦ Data points may be
contextualized by multiple aspect models (e.g., IFRS, US-GAAP)
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Data points are audit item singularities◦ Like stars in the sky◦ Viewed by life forms with different
contextualizations and measures Aspect models relate item to viewer
◦ Contextualize data point for Identification and reference Values of data point and contextualization aspects Semantic description (possibly localized)
Data point aspect models
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aspect value
Data points are absolute Aspect models can be relative to user
Data point contextualization views
Data point
US-GAAPcontextualization
base item
aspect value
aspect value aspect
value
IFRScontextualization
base item
aspect value
aspect value aspect
value
Romuleancontextualization
base item
aspect value
aspect value
. . .
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relationshipKind = EQUIVALENCE
02 : AspectRelationship
relationshipKind = EQUIVALENCE
01 : AspectRelationship
aspect2 = Credit LimitrelationshipKind = PART_WHOLE
06 : AspectRelationship
relationshipKind = PART_WHOLE
05 : AspectRelationship
relationshipKind = SUBSET
03 : AspectRelationship
relationshipKind = SUBSET
04 : AspectRelationship
Credit Limit : Aspect
Cash Equivalents :
NonEnumerableAspect
US GAAP : AspectSet
Common Notions : AspectSet
Cash & Cash Equivalents :
NonEnumerableAspect
Liability : Aspect
Cash Equivalents :
Aspect
IFRS : AspectSet
Loan Balance : Aspect
Cash : NonEnumerable
Aspect
Cash : Aspect ...
Aspect semantics
IFRS 1 aspect
USGAAP 2 aspects
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Authority 1 Aspects are
More Dimensionalized
Common Semantic Concepts
…
…
Authority 2 Aspects are
Less Dimensionalized
…
= Atomic Semantic Concept
= Aspect
Aspect semantics composition
Aspect is a composite of atomic semantics Different sets have more atomic semantics in
some aspects
legend: = Aspect Model
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London discussion on compressing XBRLinstance contexts by aspect reduction◦ (pseudo-concept URI of data point template)
Flattened aspects isomorphicData point
aspect value
EBAcontextualization
base item
aspect value
aspect value
Compressedcontextualization
pseudo concept
few aspects
flatten to one base-item per source dimensional-base-item combination
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Data point base item is ‘just’ an aspect◦ E.g., a concept which is a string type
Base item has a set of values◦ Models fact value as base item aspect value(s)◦ Allows modeling multi-language strings as single
data point, or numeric, as set of different measures
Relationships can model◦ Base item relationships (concept-to-concept)◦ Dimensional value relationships◦ Fact value-item relationships (fact-to-fact)◦ Label, reference, and semantic relationships
Data point may be a set of values
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+refToSemanticVocabEntry : anyURI [0..1]
«Metaclass»Aspect
isAspectDefault : boolean [1]value : anyType [1]+refToSemanticVocabEntry : anyURI [0..1]
«Metaclass»AspectValue
«Metaclass»AspectValueSelectionGroup
«Metaclass»AspectValueSelection
«Metaclass»CubeRegion
«Metaclass»Cube
aspectToReport
0..*
1
0..*
1
1..*0..*0..*1
owner 1
0..*
1..*
0..*
2. Valid Combinations
Based on CWM OLAP cubes and cube regions◦ These form positive
XBRL hypercubes
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Specifies which data points may exist as facts◦ Based on valid combinations of aspect values
Captures how groupings of aspect values◦ May be allowed by combination
Represented in ◦ XBRL syntax as hypercubes
XBRL syntax realizes abstract model by positive and negative hypercubes
◦ OLAP as cubes with cube region OLAP has additive cube regions
Valid combinations model
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Required to specify tables◦ Presentable and enterable coordinates
Coordinates are sets of aspect values Filter data points for compatibility with table cells Entry of new data uses aspects to specify data point
Valid combinations model, cont.
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disposition : AxisDisposition [1]
«Metaclass»Axis
isAbstract : boolean [1] = falseorderNumber : decimal [1]
«Metaclass»AxisOrdinate
«Metaclass»Table
...
«Metaclass»AspectValue
...
«Metaclass»Aspect
xyz
«enumeration»AxisDisposition
«Metaclass»Cube
aspectToReport
0..10..*
contextualizingAspectValue
0..*0..*
/inheritedContextualizingAspectValue
0..*0..*
/inheritedAspectToReport
0..10..*
child 0..*parent 0..1
validCube 0..*
0..*
{ordered}1..*
0..*
1..*
1..*
views valid combi-nations of data points
relates aspect values to coordinates of viewing axes
model for presentation including traditional instance rendering
3. Table
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disposition : AxisDisposition [1]
«Metaclass»Axis
isAbstract : boolean [1] = falseorderNumber : decimal [1]
«Metaclass»AxisOrdinate
«Metaclass»DataPoint
«Metaclass»Table
...
«Metaclass»AspectValue
...
«Metaclass»Aspect
«Metaclass»Cube
«Metaclass»Cell /inheritedAspectToReport
0..10..*
contextualizingAspectValue
0..*0..*
aspectToReport
0..10..*
/inheritedContextualizingAspectValue
0..*0..*
0..*cell
owningTable
1
child 0..*parent 0..1
compatibleDataPoint 0..1
compatibleCell 0..*
validCube 0..*
0..*
1..*0..*
{ordered}
1..*
0..*
1..*
1..*
Tableinstance withcells
Cells populate with compatible data points
Empty cells enter new data points allowed by cube region
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minOccurrences : nonNegativeInteger [0..1]maxOccurrences : nonNegativeInteger [0..1]
...
«Metaclass»StructuringRelationship
minLength : nonNegativeInteger [0..1]length : nonNegativeInteger [0..1]maxLength : nonNegativeInteger [0..1]
«Metaclass»StringDataType
maxExclusive : decimal [0..1]minInclusive : decimal [0..1]minExclusive : decimal [0..1]fractionDigits : nonNegativeInteger [0..1]totalDigits : positiveInteger [0..1]maxInclusive : decimal [0..1]
«Metaclass»DecimalDataType
name : QName [1]pattern : string [0..1]miscellaneouslRestriction : string [0..1]itemConcept [0..*]
«Metaclass»AtomicDataType
structuringKind : StructuringKind
«Metaclass»StructuredType
«Metaclass»DateDataType
«Metaclass»TimeDataType
«Metaclass»DataType
1
0..*
derivedType
0..*
baseType 0..1
1 0..*
Abstracted XML types◦ Items (XBRL facts)◦ typed dimensions,◦ attributes, and◦ resources (footnotes)
6. Typing
. . .
. . .
. . .
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XBRL concrete syntax◦ XBRL Instance, Inline XBRL Instance◦ DTS, Dimension, Typing◦ Formula, Version Report, Table Linkbase
XBRL GL logical model Charlie’s Financial Report Logical Model Consumption model for OLAP
Secondary models
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XBRL Instance◦ Facts, Aspects
XBRL Inline Instance XBRL DTS
◦ Concepts, dim. & footnote elements, attributes◦ Relationships
XBRL Dimensions XBRL Typing XBRL Rendering
◦ XBRL Table Formula
Models of XBRL Syntax
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XBRL Instance
Start : dateTime [0..1]End/Instant : dateTime [1]isForever : $OCL_Boolean
«Metaclass»Period
prohibition and override
«Metaclass»AttributedRelationship
unnamed1 : xmlDocument
«Metaclass»DTS
fileURIencodingprocessingInstructionscomments
«Metaclass»xmlDocument
«Metaclass»ExplicitDimension
«Metaclass»TypedDimension
«Metaclass»DataPoint
«Metaclass»ConceptElement
«Metaclass»FactRelationship
multiply Measuresdivide Measures
«Metaclass»Unit
Scheme : anyURI
«Metaclass»EntityIdentifier
«Metaclass»FactCollection
...
«Metaclass»Fact
«Metaclass»Footnote
SegScen
«Metaclass»OCC
«Metaclass»Attribute
«Metaclass»Element
valueaccuracy
«Metaclass»FactItem
«Metaclass»FactTuple
«Metaclass»Document «Metaclass»
Aspect
«Metaclass»Language
text block contents
location
0..*
0..* 0..*
0..*
1
1
1
Fact Items
1
0..*
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Facts
Aspects
Start : dateTime [0..1]End/Instant : dateTime [1]isForever : $OCL_Boolean
«Metaclass»Period
«Metaclass»ExplicitDimension
«Metaclass»TypedDimension
«Metaclass»ConceptElement
multiply Measuresdivide Measures
«Metaclass»Unit
Scheme : anyURI
«Metaclass»EntityIdentifier
«Metaclass»FactCollection
«Metaclass»Footnote
«Metaclass»Aspect
«Metaclass»Language
SegScen
«Metaclass»OCC
location
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Start : dateTime [0..1]End/Instant : dateTime [1]isForever : $OCL_Boolean
«Metaclass»Period
fileURIencodingprocessingInstructionscomments
«Metaclass»xmlDocument
«Metaclass»ExplicitDimension
«Metaclass»DataPoint
multiply Measuresdivide Measures
«Metaclass»Unit
Scheme : anyURI
«Metaclass»EntityIdentifier
«Metaclass»Element
...
«Metaclass»Aspect
«Metaclass»Transform
«Metaclass»Fact
«Metaclass»Document
«Metaclass»Attribute
«Metaclass»Footnote
HTML elements
0..* 1
0..*
1
Visible model◦ HTML elements
Content model◦ Facts◦ Aspects (hidden)◦ Footnotes
Inline XBRL
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/isDirected : boolean [1]
«Metaclass»AspectValueRelationship
balanceTypeperiodType
«Metaclass»Concept
prohibition and override
«Metaclass»AttributedRelationship
unnamed1 : xmlDocument
«Metaclass»DTS
«Metaclass»BaseSetRelationship
«Metaclass»GenericRelationship
«Metaclass»AttributeDeclarator
isAbstract
«Metaclass»ElementDeclarator
link rolearc roleorder [0..1]{readOnly}
«Metaclass»BaseSet
hypercube link role
«Metaclass»DRSRelationship
fileURI : anyURI
«Metaclass»Schema
«Metaclass»Aspect
anyURI [1]
«Metaclass»Linkbase
«Metaclass»FactType
«Metaclass»Resource
«Metaclass»Type
«Metaclass»Label
«Metaclass»Particle
«Metaclass»Reference
2..*
0..*
1..21
2..1 1
1..*
substitutesFor
Concepts
XBRL DTSRelationships
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XBRL Dimensions overviewDTS
DRS RelationshipConcept
«Metaclass»AspectValueSelectionGroup
isAspectDefault : boolean [1]value : anyType [1]
«Metaclass»AspectValue
«Metaclass»HypercubeDimension
«Metaclass»AspectValueSelection«Metaclass»
DimensionDomain
«Metaclass»DomainMember
negated
«Metaclass»HasHypercube
«Metaclass»PrimaryItem
«Metaclass»Member
«Metaclass»Hypercube
«Metaclass»Dimension
«Metaclass»Domain
«Metaclass»CubeRegion
«Metaclass»Inheritance
«Metaclass»Aspect *
1
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XBRL Typingname : QName [1]pattern : string [0..1]miscellaneouslRestriction : string [0..1]itemConcept [0..*]
«Metaclass»AtomicDataType
structuringKind : StructuringKind
«Metaclass»StructuredType
«Metaclass»AttributeDeclaratorsGroup
«Metaclass»type
«Metaclass»ParticleCompositor
«Metaclass»AttributeDeclarator
isAbstract
«Metaclass»ElementDeclarator
«Metaclass»ParticleGroup
«Metaclass»UserDefined
«Metaclass»AtomicType
«Metaclass»Concept
«Metaclass»Atomic
«Metaclass»Simple
«Metaclass»Complex
«Metaclass»List
«Metaclass»Particle
«Metaclass»Facet
«Metaclass»Union
1
*
*
1
*
extend/restrict
particles composition
*
1..*
substitutesFor
0..*
1
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XBRL Rendering Linkbase
«Metaclass»TableOfContents
«Metaclass»Input Instances
«Metaclass»Component«Metaclass»
Indentifier
«Metaclass»Container
«Metaclass»Table
«Metaclass»Document
«Metaclass»Header
«Metaclass»Manifest
«Metaclass»Filters
«Metaclass»Paragraph
«Metaclass»Rules
«Metaclass»Axis
«Metaclass»Values
«Metaclass»List
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«Metaclass»PredefinedAxis
«Metaclass»DimensionRelationshipAxis
«Metaclass»ConceptRelationshipAxis
«Metaclass»Table
«Metaclass»OpenAxis
«Metaclass»ExplicitDimension
«Metaclass»TypedDimension
«Metaclass»RelationshipAxis
«Metaclass»PeriodFilter
«Metaclass»Filter
«Metaclass»FilterAxis
«Metaclass»LocationFilter
«Metaclass»ConceptFiler
«Metaclass»GeneralFilter «Metaclass»
DimensionFilter
«Metaclass»AbstractAspect
«Metaclass»EntityIdentifier
«Metaclass»SelectionAxis
«Metaclass»Composition
«Metaclass»RuleAxis
«Metaclass»Period «Metaclass»
Concept
XBRL Table
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XBRL Formula
«Metaclass»CustomFunctionImplementation
«Metaclass»CustomFunctionSignature
«Metaclass»ConsistencyAssertion
«Metaclass»ExistenceAssertion
«Metaclass»AssertionSet
«Metaclass»ValueAssertion
«Metaclass»Precondition
«Metaclass»FactVariable
«Metaclass»VariableSet
«Metaclass»Instance
«Metaclass»Filter
«Metaclass»Message
«Metaclass»Variable
«Metaclass»Formula
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amount : decimal [0..1]debitCreditCode [0..1]
«Metaclass»Detail
entriesTypeuniqueIdlanguagecreationDatecreatorcommentperiodCoveredStartperiodCoveredEndsourceApplicationdefaultCurrency
«Metaclass»LedgerEntries
fileURIencodingprocessingInstructionscomments
«Metaclass»xmlDocument
enteredByenteredDatejournalIdjournalDescriptionentryTypeentryComment
«Metaclass»Entry
«Metaclass»DataPoint
«Metaclass»documentType
IDdescriptionpurposetype
«Metaclass»Account
«Metaclass»postingStatus
codedescriptiontype
«Metaclass»reference
«Metaclass»postingDate
«Metaclass»Document
«Metaclass»Aspect
identifierdescription
«Metaclass»Entity
«Metaclass»unit
«Metaclass»Table
1
1..*
XBRL GL
Model view of XBRL GL
(not syntax)
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...
«Metaclass»AspectValue
...
«Metaclass»Aspect
...
«Metaclass»AxisOrdinate
«Metaclass»DataPoint
«Metaclass»CubeRegion
«Metaclass»Network
«Metaclass»SEC Filing
«Metaclass»Hypercube
«Metaclass»Table
«Metaclass»ConceptElement
«Metaclass»Fact
«Metaclass»Concept
«Metaclass»Line Item
«Metaclass»Value
«Metaclass»Member
«Metaclass»Domain
«Metaclass»Axis
«Metaclass»Relations
«Metaclass»Table
Charlie’s Model
Financial Report Logical Model
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Common metamodel instances of◦ Data dictionary◦ Data point templates, aspects, aspect type◦ Cubes and cube regions◦ Typing◦ Tables
MOF/UML populates Metadata Repository◦ Map to XBRL and other syntaxes◦ Live links to semantics (via IFRS subscriptions)
Metadata repository
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Metadata (aspect & cube models)◦ XBRL keeps extension metadata with instance
data◦ Metadata may go into a repository, vs. all into
OLAP◦ OLAP implementations have CWM subset◦ OLAP BI may not fully use cubes
Data points◦ OLAP computes sums and totals
XBRL must report sums and totals OLAP ETL must remove sums and totals
◦ Extensions customize base items and dimensions ETL must harmonize or deal with extension data
points and differences in aspect and cube models
OLAP secondary model