Multiple Model Repositories Sergejs Kozlovičs sergejskozlovicslumiilv Research Laboratory of Modeling and Software Technologies Institute of Mathematics and Computer Science University of Latvia ID: 245882 Download Presentation

The orchestra is made of four . families of instruments:. Strings. Brass. Woodwinds. Percussion. The . string. section has been a major part of the orchestra for 200 . years.. The sound is created by the vibration of strings..

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Vegetable Orchestra. Based in Vienna. Founded in February 1998. Instruments made entirely of fresh vegetables. Include carrot recorders, zucchini trumpets, eggplant clappers. Eleven . musicians, . one sound technician.

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What is an orchestra? . The orchestra is made of four . families of instruments:. Strings. Brass. Woodwinds. Percussion. Members of the brass section include:. French horn. Tuba. Trumpet. trombone. All brass instruments are made of long .

Have an understanding Concerto. Have looked at the piece ‘Pachelbel's Canon in D’. By the end of this lesson you will:. Last week we began to look at the Baroque orchestra. We will be continuing to look at this and listening to a work which contains the instruments.

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. Soma Pierce-. Smit. Memorial. Rosie Moua. South and Delong. Jacob Puccio. Northstar. and North. Tonight we will:. Demonstrate the violin, viola, cello, and bass.. Talk about renting/purchasing instruments..

S. Petersburg, October 2013. Russian folk orchestra includes 6 main groups of instruments . 1.. Domras. .. Domra. . – a Russian . folk stringed musical instrument with three or four strings. Used to produce sound pick..

Thursday, August . 17, 2017. Welcome or Welcome Back!. Where to get information about . MVHS. Orchestra Happenings:. Mrs. Betts’ . eClass. page!!. MVHS Orchestra website: mvhsorchestra.weebly.com.

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Multiple Model Repositories. Sergejs Kozlovičs. sergejs.kozlovics@lumii.lv. Research Laboratory of Modeling and Software Technologies. Institute of Mathematics and Computer Science, University of Latvia.

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Slide1

The Orchestra ofMultiple Model Repositories

Sergejs Kozlovičssergejs.kozlovics@lumii.lv

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of LatviaSlide2

The ``Orchestra'' Metaphor

Orchestra:multiple musical instrumentsplaying simultaneously

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of LatviaSlide3

The ``Orchestra'' Metaphor

Orchestra:multiple musical instrumentsplaying simultaneously

multiple model repositoriesaccessed simultaneously

(inter-repository links are possible)002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of LatviaSlide4

The ``Orchestra'' Metaphor

Orchestra:multiple musical instrumentsplaying simultaneously

multiple model repositories

accessed simultaneously(inter-repository links are possible)

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of LatviaSlide5

Meta-s

* a publication * a newspaper * The San Francisco Chronicle * the May 18 edition of the The San Francisco Chronicle * my copy of the May 18 edition of the

The San Francisco Chronicle * my copy of the May 18 edition of the The San Francisco Chronicle as it was when

I first picked it up (as contrasted with my copy as it was a few days later: in my fireplace, burning)

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

The "Gödel, Escher, Bach" book

by Douglas HofstadterSlide6

MOF Meta-Levels (Linguistic)

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of LatviaSlide7

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

Artifacts are organized into three layers:the meta-metamodel;

metamodels conforming to the meta-metamodel;

models conforming to some particular metamodel.

The Three-Level Conjecture

(I. Kurtev and J. Bézivin)Slide8

The Three-Level Conjecture(I. Kurtev and J. Bézivin, 2005)

Artifacts are organized into three layers:the meta-metamodel;

metamodels conforming to the meta-metamodel;models conforming to some particular metamodel.

The meta-metamodel is able to describe itself.

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of LatviaSlide9

MOF Meta-Levels (Linguistic)

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

UML metamodel

UML model

MOF

conforms to

conforms to

conforms toSlide10

Technical Spaces(I. Kurtev, J. Bézivin, and M. Aksit; 2002, 2005)

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

UML metamodel

UML model

MOF

conforms to

conforms to

conforms to

MOF TS

OWL classes

OWL individuals

OWL DL

conforms to

conforms to

conforms to

RDF/OWL TS

ER-model (DB schema)

DB rows

DB system tables

conforms to

conforms to

conforms to

Relational DB TSSlide11

Technical Spaces (cont.)(I. Kurtev, J. Bézivin, and M. Aksit; 2002, 2005)

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

XML schema

(.xsd)

XML document

XML metaschema

(XSD.xsd)

conforms to

conforms to

conforms to

XML TS

Java grammar

Java program

BNF

conforms to

conforms to

conforms to

Grammarware TSSlide12

Why different technical spaces?

One TS can be more suitable than anotherReusing skills and knowledge of a familiar TSA capability not available in a desired TS can be borrowed from another

TS

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of LatviaSlide13

TS interoperability

Offline solution: using projectors and extractors (B´ezivin et al.)“Online” (On-the-fly) solution: this paper!No deep copying of the data is required!

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of LatviaSlide14

Problem 1: Numerous different repositories

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

See Table 1 in the paper!Slide15

Repositories

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

See Table 1 in the paper!

MOF TS:

EMF

CDO

MDR (NetBeans)

Enchanced Model Repository

MetaMart Metadata Repository

JR

...Slide16

Repositories

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

The solution is a univeral Repository Access API, RAAPI

t

da.lumii.lv/raapi.htmlSlide17

Problem 2: Ontological meta-levels

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of LatviaSlide18

Ontological meta-levels

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of LatviaSlide19

Meta-Levels (Ontological)

A meta-metamodel that supports infinitely many ontological meta-levels (used by the JR repository):002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of LatviaSlide20

Meta-Levels (Ontological)

A meta-metamodel that supports infinitely many ontological meta-levels (used by the JR repository):

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of LatviaSlide21

Meta-Levels (Ontological)

OWL Full also supports infinitely many ontological meta-levels.002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of LatviaSlide22

Shostaks' conjecture

It is difficult for a human to think at more than two meta-levels at a time.Still, it is pretty easy for a human to focus on any two adjacent meta-levels.

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of LatviaSlide23

Shostaks' conjecture

It is difficult for a human to think at more than two meta-levels at a time.Still, it is pretty easy for a human to focus on any two adjacent meta-levels.

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

Agris Šostaks

a

t SOFSEM 2012Slide24

We divide the repository into two parts:M3 contating the meta-metamodel; fixed for a particular repository/technical space;

all other data (either M2+M1 or multiple ontological meta-levels)

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

Dealing with Šostaks' conjectureSlide25

Dealing with Šostaks' conjecture

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

RAAPI is designed to work with any two adjacent meta-levels

Switching between levels and mixing them is possible by, e.g., passing a reference to a class when a reference to an object is expected.Slide26

The Idea

The kernel represents all repositories as one big virtual repository.The kernel substitutes native references (integers) of each repository by globally unique proxy references.

Inter-repository links are stored in the pivot repository.

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of LatviaSlide27

Kernel Metamodel (the essence)

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of LatviaSlide28

RAAPI call example: createLink()

createLink(obj1_ref, obj2_ref, association_ref

);If all proxy references point to the same repository, the call is forwarded to this repository.

Otherwise, an inter-repository link is created and stored in the pivot repository.

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of LatviaSlide29

Organizing repositories

Unix file system directory tree:/boot/bin/mnt

/mnt/c /mnt/d/media

/media/cdrom/etc

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

m

ount pointsSlide30

Organizing repositories

Package tree (~ UML package tree):Package1Package2Package2::SubPackage

Package3Package4

Use “MountPoint::ClassName” to access

a class in a mounted repository

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

m

ount pointsSlide31

Organizing repositories

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

Pivot

Root

package

P1

P2Slide32

Organizing repositories

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

Pivot

Root

package

P1

P2

New repository

SubPSlide33

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

Problem 3:

M

anipulating the packages

How to merge packages?

I.e., when working with class Package1::A, objects and properties of Package2::A are also taken into a consideration.Slide34

Virtual repositories

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

Pivot

Root

package

P1

P2

Virtual repository

SubP

Relies on data from somewhere else

(or, invents data)Slide35

Virtual repositories

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

Pivot

Root

package

P1

P2

Virtual repository

SubP

Relies on data from somewhere elseSlide36

Virtual repositories

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

Pivot

Root

package

P1

P2

Virtual repository

SubP

Relies on data from somewhere else

On-the-fly

m

odel

transformationSlide37

Use cases for virtual repositories

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of LatviaSlide38

Views on metamodels

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

Pivot

Root

package

P1

P2

Virtual repository

SubP

View

Base

metamodelSlide39

Volatile repository

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

Pivot

Root

package

P1

P2

Virtual repository

(stores its content

In RAM)

SubP

Volatile

repositorySlide40

Virtual merge

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

P

QSlide41

Virtual merge

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

P

Virtual repository

i

mplementing

“merge”

Q

PSlide42

Derived (calculated) associations and properties

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

A

BSlide43

Derived (calculated) associations and properties

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

A

B

A

B

Virtual repository

c

omputes

the associationSlide44

Derived (calculated) associations and properties

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

A

B

A

B

Virtual repository

c

omputes

the association

Finally, we just need to virtually merge these two packages!

mergeSlide45

Virtual copy

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

PSlide46

Virtual copy

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

P

Virtual

repository

2

P’

P

(old data)

Virtual

repository

1Slide47

Virtual copy

002

Research Laboratory of Modeling and Software Technologies

Institute of Mathematics and Computer Science, University of Latvia

P

Virtual

repository

2

P’

P

(old data)

Virtual

repository

1

Δ

2

Δ

1Slide48

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