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Towards Readable Layouts for Modeling Data Warehouses
Jesús PardilloUniversity of Alicante, Spain
Florian MansmannUniversity of Konstanz, Germany
[email protected]/members/mansmann
2J. Pardillo & F. Mansmann: Towards Readable Layouts for Modeling Data Warehouses. DOLAP’10
Garrigós et al.(ER’09)
3J. Pardillo & F. Mansmann: Towards Readable Layouts for Modeling Data Warehouses. DOLAP’10
Level Attributes(Product)
Fact Measures(Sale)
Fact Granularity(Sale)
Dimension Hierarchies (Store)
Schema Dimensionality DimensionAttributes
(Store)
4J. Pardillo & F. Mansmann: Towards Readable Layouts for Modeling Data Warehouses. DOLAP’10
is more readable than
Research Hypothesis
5
Research Outline
‣ Materials:
✓ Viewpoints
✓ Graph layouts
✓ Readability measures
‣ Method:
✓ Expert Measurement
‣ Findings:
✓ Readability evaluation
✓ Readability by viewpoint
J. Pardillo & F. Mansmann: Towards Readable Layouts for Modeling Data Warehouses. DOLAP’10
6J. Pardillo & F. Mansmann: Towards Readable Layouts for Modeling Data Warehouses. DOLAP’10
is indeed more readable than
Conclusion
7
Research Outline
‣ Materials:
✓ Viewpoints
✓ Graph layouts
✓ Readability measures
‣ Method:
✓ Expert Measurement
‣ Findings:
✓ Readability evaluation
✓ Readability by viewpoint
J. Pardillo & F. Mansmann: Towards Readable Layouts for Modeling Data Warehouses. DOLAP’10
8
Attributionof a Level
Granularityof a Fact
Measurementof a Fact
Attributionof a Dimension
DimensionalityAggreg. Hierarchies
of a Dimension● ● ● ● ●
J. Pardillo & F. Mansmann: Towards Readable Layouts for Modeling Data Warehouses. DOLAP’10
Garrigós et al. (ER’09)
9
Attributionof a Level
Granularityof a Fact
Measurementof a Fact
Attributionof a Dimension
DimensionalityAggreg. Hierarchies
of a Dimension● ● ● ● ●
J. Pardillo & F. Mansmann: Towards Readable Layouts for Modeling Data Warehouses. DOLAP’10
Garrigós et al. (ER’09)
10
Attributionof a Level
Granularityof a Fact
Measurementof a Fact
Attributionof a Dimension
DimensionalityAggreg. Hierarchies
of a Dimension● ● ● ● ●
J. Pardillo & F. Mansmann: Towards Readable Layouts for Modeling Data Warehouses. DOLAP’10
Garrigós et al. (ER’09)
11
Attributionof a Level
Granularityof a Fact
Measurementof a Fact
Attributionof a Dimension
DimensionalityAggreg. Hierarchies
of a Dimension● ● ● ● ●
J. Pardillo & F. Mansmann: Towards Readable Layouts for Modeling Data Warehouses. DOLAP’10
Garrigós et al. (ER’09)
12
Attributionof a Level
Granularityof a Fact
Measurementof a Fact
Attributionof a Dimension
DimensionalityAggreg. Hierarchies
of a Dimension● ● ● ● ●
J. Pardillo & F. Mansmann: Towards Readable Layouts for Modeling Data Warehouses. DOLAP’10
Garrigós et al. (ER’09)
13
Attributionof a Level
Granularityof a Fact
Measurementof a Fact
Attributionof a Dimension
DimensionalityAggreg. Hierarchies
of a Dimension● ● ● ● ●
J. Pardillo & F. Mansmann: Towards Readable Layouts for Modeling Data Warehouses. DOLAP’10
Garrigós et al. (ER’09)
14
Arc Diagram Cross-tab
+
+
+ +
+
StackMesh
ParallelCo-ordinates
Radial
Tree Table
Tree
Graph Layouts
J. Pardillo & F. Mansmann: Towards Readable Layouts for Modeling Data Warehouses. DOLAP’10
15
Layouts by Viewpoint
attribution by level
dimensionality
attribution of a dimension
measurement of a fact
granularity of a fact
aggr. hierarchies
of a dimension
J. Pardillo & F. Mansmann: Towards Readable Layouts for Modeling Data Warehouses. DOLAP’10
16
‣ Continuity:
‣Orthogonality:
‣ Proximity:
‣ Symmetry:
‣ Density:
‣ Edge Overlap:
‣ Fast Traversal:J. Pardillo & F. Mansmann: Towards Readable Layouts for Modeling Data Warehouses. DOLAP’10
Rea
dabi
lity
Mea
sure
s
17
Readability Evaluation
continuity
orthogonality
proximity
symmetry
densityedge overlap
fast traversal
J. Pardillo & F. Mansmann: Towards Readable Layouts for Modeling Data Warehouses. DOLAP’10
18
Readability by Viewpoint
attribution by level
dimensionality
attribution of a dimension
measurement of a fact
granularity of a fact
aggr. hierarchies
of a dimension
J. Pardillo & F. Mansmann: Towards Readable Layouts for Modeling Data Warehouses. DOLAP’10
19J. Pardillo & F. Mansmann: Towards Readable Layouts for Modeling Data Warehouses. DOLAP’10
is indeed more readable than
Conclusion
