Commit 943208a2 authored by npedot's avatar npedot
Browse files

updates overall

parent cda56a11
......@@ -133,3 +133,4 @@ Section 3.1. Row and Column Filtering
Section 3.2. Aggregations
Section 3.3. Join and Concatenation
Section 3.4. Transformation: Conversion, Replacement, Standardization, and New Feature Generation
......@@ -41,7 +41,7 @@ Per la descrizione del modello concettuale si usera' Object Role Modeling[] in q
Ogni passaggio e' stato studiato per ridurre al minimo le frizioni di perdita di informazione dovute alla poverta' semantica dei livelli fisici rispetto alla ricchezza di quelli concettuali, evidenziando i necessari compromessi pratici.
## ORM
## Model top-down: ORM
In ORM, the knowledge is structured into:
* Facts, A fact is a statement, or assertion, about some piece of information within the
......@@ -60,9 +60,11 @@ Instructor 100 works for Department “CS” (fact instance)
For a detailed guide [Guide to FORML]
## Reverse
## Model bottom-up: Reverse
[Nony]
## Merge
As with pay as you go[] we may have At the center of the
......@@ -86,7 +88,7 @@ Business Expert giving business value to data
Knowledge Scientist, design ontology competence
IT Dev, to data access
## Map from conceptual
## Map to ER from conceptual
[Halpine]
## Query
......
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