Wp item 6
Download
1 / 12

WP Item 6 - PowerPoint PPT Presentation


  • 91 Views
  • Uploaded on

WP Item 6. Expressions and Calculations . Goals of the WP item (1). Adopt a Language for Calculations and Validations, as envisaged in the package n.13 of SDMX Information Model

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' WP Item 6' - danika


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Wp item 6

WP Item 6

Expressions and Calculations

SDMX Technical Working Group

Paris


Goals of the wp item 1
Goals of the WP item (1)

Adopt a Language for Calculations and Validations, as envisaged in the package n.13 of SDMX Information Model

The SDMX package n. 13 – Transformations and Expressions – is a generic model aimed to track the derivation of data, derived from the CWM (Common Warehouse Metamodel), a OMG standard (Object Management Group) widely used in the IT field

SDMX Technical Working Group

Paris


Goals of the wp item 2
Goals of the WP item (2)

Make it possible to define and exchange the algorithms either used or specified for calculating dataand the coherence rules, either enforced or looked-for between different data

Design the language for defining expressions (expression language) – that is the list of the operators available and their formal grammar

Design the IT formats (messages) for exchanging the definitions of the Transformations (calculations and validations defined by means of expressions)


Sdmx im package 13
SDMX IM – Package 13

SDMX Technical Working Group

Paris


Operand:

C

Operator:

**

b

Operand:

2

p

Operator:

*

f

Result: E

f

Operand:

M

Operator nodes

Reference nodes

0..*

Constant node

Expression nodes

Transformations; internal view

Einstein equation E = MC2 E = M*(C**2)

SDMX Technical Working Group

Paris

5


Operand:

C

Operand:

2

Operand:

M

Transformations: User view

Einstein equation E = MC2 E = M*(C**2)

Expression:

E = M*(C**2)

Result: E

SDMX Technical Working Group

Paris

6


Notes on Transformations

  • The Operands may be:

    • Artefacts of the model (e.g. Statistical Data)

    • Constants

    • Operator nodes

  • The property of “Closure”

    • The result is an artefact of the model (e.g. Statistical Data)

    • The result may be operand of other calculations

SDMX Technical Working Group

Paris

7


Graph of the calculations
Graph of the calculations

Economic research models

External Institutions

T53

T51

C51

C53

C3

T1

C1

T2

C4

C54

T54

C52

T52

C2

T3

C5

Statistical bulletin

T60

Banks & OFI’s reports

C60

T61

C61

C10

C17

T14

C15

T12

C12

Statistical products

C13

C16

T13

T70

C70

C72

T72

T71

C71

C.C.R.

C21

C23

T21

Supervision models

C41

C22

T41

C24

T22

C42

T42

SDMX Technical Working Group

Paris

8


Validation as a calculation
Validation as a Calculation

Formal (Structural)

assurance that the formal structure of the data observations matches the Data Structure Definition, in term of concepts, their roles and their admissible values; the formal validation is not a calculation and is not defined through an expression;

Of the Information Content (Plausibility)

Assurance that the data content gives right information about the real world (as much as possible); to this end, it is possible to use the a-priori information about the real world and the possible redundancies of the data (e.g. the integrity rules, coherence rules, plausibility rules); this kind of validation rules is normally performed through calculations,

SDMX Technical Working Group

Paris


Validations as calculations

  • Use of the same language of the calculations

  • Validations possible in any phase of the process

  • Results of the Validations like any other data

    • are defined and stored

    • can be inquired and disseminated

    • can be further processed

SDMX Technical Working Group

Paris

10


Main goals fot the twg meeting
Main goals fot the TWG meeting

Share information on the existing languages (input from the Secretariat: not reinvent the wheel and start from existing experiences) :

  • Presentation of ESS VIPV project

  • Presentation of XBRL formula

  • Presentation of Banca d’Italia EXL

    Share the general principles and requisites of the solution

    Share the working programme for this item, involving the SWG

SDMX Technical Working Group

Paris


Wp item 61

WP Item 6

Expressions and Calculations

SDMX Technical Working Group

Paris


ad