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a f o t n e m p o l e v e d e h T . y g o l o n h c e t g n i s s e c o r p a t a d l a c i t y l a n a e h t f o t n e m p o l e v e d r o f e u s s i l a c i p o t

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• -lineanalytica lprocessing[1 ,2];

; n o i t a m r o f n i f o s s o l t u o h t i w l e d o m n o m m o c e h t o t n i s t a m r o f a t a d s u o i r a v t r e v n o c o t e l b a e b •

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s e i r e u q l a c i t y l a n a y r a r t i b r a e h t g n i t u c e x e d n a g n i m r o f t r o p p u s •

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] 3 [ l e d o m l a c i t y l a n a l a r g e t n i

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t s e d i v o r p l e d o m P A L O l a r g e t n i e h t , l e d o m a t a d l a n o i s n e m i d i t l u

m heability to trea tthe analytica l

s s e c o r p g n i z y l a n a e h t f o c i t s i r e t c a r a h c c i r e m u n a s i » t c a f « e h t : y g o l o n h c e t P A L O f o s m r e t n i s t p e c n o c

n g i s e d l e d o m l a n o i s n e m i d i t l u m e h t f o e c n e i r e p x e e h T . s i s y l a n a f o t c e p s a n a s i » n o i s n e m i d « e h t d n a

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u e h T . s i s y l a n a y r o t a r o l p x e e h t e d i v o r p s e i r e u q y r a r t i b r a f o n o i t c u r t s n o c e h t d n a n o i t a g i v a

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f o g n i h c t a m d e t a m o t u a f o s t l u s e r e h t d n a a t a d d e t a r g e t n i e h t f o s e r u t a e f l a r u t c u r t s e h t f o s i s y l a n a

. s e c r u o s s u o i r a v m o r f n o i t a m r o f n i

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.l e d o m n o m m o c e h t o t n i e m e h c s g n i r o t s l a i t i n i e h t f o n o i t a m r o f s n a r t e h t r o f m h t i r o g l a n a e s o p o r

p

n i d e r e f f o s i e s a b a t a d l a n o i t a l e r d e z i l a m r o n a r o f s t p e c n o c l a c i t y l a n a g n i r e v o c s i d r o f m h t i r o g l a e h T

t c e j b o g n i t c u r t s n o c r o f m h t i r o g l a e h t f o t n e m p o l e v e d e h t o t d e t c u d n i s i k r o w t n e r r u c e h T . ] 8 [

f l e d o m l a c i t y l a n a l a r g e t n i e h t f o t r a p d n a l e d o m y h c r a r e i

h or XML sources .The algorithm is

( e d o c o d u e s p a s a d e t n e s e r

p Figure1).

y t i r a l u p o p s t I . t e n r e t n I e h t n o t a m r o f a t a d r a l u p o p t s o m e h t s i ) e g a u g n a L p u k r a M e l b i s n e t X e ( L M X

; l a s r e v i n u s i t i ) 2 ( ; n a m u h e h t y b d a e r e b n a c t i ) 1 ( : g n i w o l l o f y b d e n i a l p x e e b n a

c (3)i ti ssupportedby

T

I -gian tlike Microsoft ,Oracle and IBM .The fundamen tof its predominance is XML Schema L

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D -documen tstructure .XML-documents are classified as i

m e

s -structured datasincethestandard ofstructuring isthe relationa lschemaforstoring datain a d e d r a w r o f e h t f o n o i t r o p o r p e h t y l n o t o n s e b i r c s e d n o i t a c i f i c e p s D S X e h t , r e v e w o H . m r o f e l b a t

s e s o p m i d n a s e i t r e p o r p r i e h t , s t n e m e l e e h t n e e w t e b s p i h s n o i t a l e r e h t s e n i f e d t i o s l a t u b n o i t a m r o f n i

n o i t c i r t s e

r son them .Intheframeworkofthisstudy ,wewil lproceedfrom theassumption tha tthe .l

e d o m l a c i t y l a n a e h t g n i t c u r t s n o c r o f n o i t a m r o f n i h g u o n e s n i a t n o c e m e h c s D S

X

i t n e m d l u o h s e w , s t n e m u c o d L M X r o f l e d o m l a c i t y l a n a n a f o n o i t c u r t s n o c e h t t u o b a g n i k a e p

S on

L M X e h t , y l t s r i F . ] 0 1 , 9 [ s e i g o l o n h c e t L M X d n a P A L O g n i t a r g e t n i f o e c n e i r e p x e e g r a l r e h t a r e h t

h c i h w ] 2 1 [ e s u o h e r a w a t a d e h t o t ] 1 1 [ n o i t a m r o f n i g n i r r e f s n a r t d n a g n i r o t s r o f d e s u y l e d i w s i t a m r o f

n o e h t n o d e s u c o f s

i -lineanalytica lprocessing .Secondly ,anumberofmethodsandalgorithms[ 13 ,14] g n i t s i x E . d e s o p o r p e r a s e c r u o s L M X r o f l e d o m a t a d l a n o i s n e m i d i t l u m e h t g n i t c u r t s n o c r o f

a t a d e h t o t n i n o i t a m r o f n i g n i d a o l r e t f a r u c c o l l i w a t a d f o g n i s s e c o r p l a c i t y l a n a t s e g g u s s e h c a o r p p a

u b r e t f a d n a e s u o h e r a

w ildingt heclassica lanalytica lmodels .Thus,t hepreviouslyproposedmethods e h t n o i t a m r o f s n a r t o t d e t n e i r o e r a s t n e m u c o d L M X r o f l e d o m l a n o i s n e m i d i t l u m e h t g n i t c u r t s n o c r o f

e h t n o g n i d n e p e d , e r u t c u r t s e s u o h e r a w a t a d a o t n i e r u t c u r t s e g a r o t s a t a d l a i t i n

i storageprinciples.

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. " t p e c n o c l a c i t y l a n a " f o m r e t e h t h t i w e t a r e p o l l i w e w a t a d f o l e d o m l a c i t y l a n a l a r g e t n i e h t g n i d l i u B

t p e c n o c l a c i t y l a n a e h

T isa tthelowes tconceptua llevel .I tisan atomicindivisibleuni tofthedata a t a d f o t a m r o f e h t y b d e n i m r e t e d s i s t p e c n o c l a c i t y l a n a e h t f o t n e m e g n a r r a e h T . e r u t c u r t s

, s e l b a t o t n i s t p e c n o c l a c i t y l a n a e h t e t a d i l o s n o c s e s a b a t a d l a n o i t a l e r : n o i t a t n e s e r p e

r calling them

, e r u t c u r t s l a c i h c r a r e i h a s a s t p e c n o c l a c i t y l a n a e h t t n e s e r p e r s t n e m u c o d L M X ; s d l e i f r o s e t u b i r t t a

. s t n e m e l e m e h t g n i l l a c

D S X e h t n i s t p e c n o c l a c i t y l a n a e h t d n i f o t s i m h t i r o g l a d e s o p o r p e h t f o k s a t e h

T -document ,to

d n a s t c a f o t n i m e h t e d i v i

d dimensions and to revea lthe analytica lrelationships between them . s e i h c r a r e i h e h t g n i m r o f d n a m e h t n e e w t e b s n o i t c e n n o c e h t g n i l a e v e r , s t p e c n o c l a c i t y l a n a e h t g n i r e f f i D

. o o t l e d o m l a n o i s n e m i d i t l u m l a c i s s a l c e h t f o n o i t c u r t s n o c r o f s e u s s i s u o i v b o e r a

v e w o

H er ,in accordancewith thetraditiona lapproach ,the factscharacterizing oneaspec tofthe t o n s e o d h c a o r p p a h c u S . y l t n e d n e p e d n i d e r e d i s n o c e b t o n n a c d n a d e t a d i l o s n o c e r a s s e c o r p d e z y l a n a

c i t y l a n a e h t f o n o i t a l u p i n a m e v i t a n e h t f o s t n e m e r i u q e r e h t y f s i t a

s a lconcepts ;i tcomplicates the

e d u l c n i o t r e d r o n I . s e i r e u q l a c i t y l a n a y r a r t i b r a g n i t c u r t s n o c d n a s e c r u o s l a r e v e s g n i g r e m f o s e s s e c o r p

s t p e c n o c l a c i t y l a n a e h t r e d i s n o c o t y r a s s e c e n s i t i , l e d o m l a c i t y l a n a l a r g e t n i e h t n i e c r u o s a t a d a

e d o T . y l t n e d n e p e d n

i notet hedesiredmode lwei ntroducet het ermofa"multidimensiona lmode lwith " l e d o m a t a d l a n o i s n e m i d i t l u m d e r e d r o " s m r e t e h t ] 8 , 4 [ n i y l s u o i v e r P . " s t p e c n o c c i t y l a n a t n e d n e p e d n i

. d e r e f f o n e e b e v a h " l e d o m a t a d l a n o i s n e m i d i t l u m d e t a l e r r e t n i " d n a

e t n i n a s

A rmediatestage ,theobjec tmode loftheXSDdocumen tisformed .Ifanelemen ttypeis f o s t n e m e l e d n a s e p y t x e l p m o c f o s e t u b i r t t a e h T . s s a l c t n e d n e p e d n i n a s e n i f e d t i " e p y T x e l p m o c "

o e h t f o s e u l a v e h T . s s a l c t n e r a p e h t f o s e i t r e p o r p e h t e n i f e d " e p y T e l p m i s

" perators(choice ,sequence ,

) s r u c c O n i m , s r u c c O x a m , n o i t a t o n n a , n o i t c i r t s e r , n o i s n e t x

e characterizethestructurall imitationsand

L M X e h t f o s t n e m e l e e h t n e e w t e b s p i h s n o i t a l e

r -document .Theproposedalgorithmforconstructing t

i w l e d o m l a n o i s n e m i d i t l u m e h

t hi ndependen tanalytica lconceptsallowt oconver tsimplet ypesi nto y e k f o e c n e s b a e h t n I . s e p y t x e l p m o c l a r e v e s o t d e t a l e r e r a h c i h w s e s s a l c e n i f e d o t d n a s e t u b i r t t a

l u m i s e b n a c s t c a f e h t o S . l a u q e s a s e t u b i r t t a l l a t a e r t o t d e t s e g g u s s i t i , s e t u b i r t t

a taneouslyanalyzed

e h t l l a h t i w d n a ) y h c r a r e i h e h t f o l e v e l e m a s e h t n o s i h c i h w ( s n o i s n e m i d g n i r o b h g i e n s t i h t i w

s e i c n e d n e p e d l a n o i t c n u f o t r a l i m i s ( y t i v i t i s n a r t t n u o c c a o t n i g n i k a t , s t n e m e l e t n e r a p e h t f o s n o i s n e m i d

c i t n a m e s e h T . ) s e s a b a t a d l a n o i t a l e r n

i oft heXSDspecificationallowsust ofindi dentifiers(counters) .

m e h t r o f s n o i t c n u f n o i t a g e r g g a f o e c i o h c e h t t i m i l d n

a The algorithm is represented by three

( ) ( s e s s a l C t e g , ) ( m h t i r o g l a : s n o i t c n u

f Figure2)andgetConcepts()(Figure3).

g i

F u 2. ere T h functionforfillingt heobjec twithpropertiesandrelationshipswithotherobjects.

f o l e v e l y n a d n a n o i t c n u f y n a m o r f m e h t o t s s e c c a e d i v o r p o t r e d r o n i l a b o l g d e r a l c e d e r a s t e s e m o S

e h t f o s t n e m e l e e h t e b i r c s e d h c i h w s t c e j b o f o t e s e h t s i K . n o i s r u c e

r structure ;KE is the se tof

D S X e h t f o s e c i t r e v f o t e s e h t s i V ; K m o r f s t c e j b o n e e w t e b s n o i t a i c o s s

a -filetree ;vE isthese tof

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.l e d o

m F is these tofobjects describing the facts ofthemultidimensiona lmodel ;R is the se tof l a n o i s n e m i d i t l u m e h t f o s t c a f d n a s n o i s n e m i d n e e w t e b p i h s n o i t a l e r c i t y l a n a e h t g n i b i r c s e d s t c e j b o

.l e d o m

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F u 3. re Thefunctionforgeneratingt heanalytica lconcepts.

n u f n i a m e h

T ctionoft healgorithm"algorithm()"providest hegenerationofase tofobjects- K .I t d e l l a c s i ) ( s e s s a l C t e g n o i t c n u f e h T . ) ( s t p e c n o C t e g d n a ) ( s e s s a l C t e g s n o i t c n u f e v i s r u c e r e h t s l l a c

l b i s n o p s e r s i d n a t c e j b o w e n e h t f o n o i t a e r c e h t r e t f a y l e t a i d e m m

i e for filling the objec twith

) ( s t p e c n o C t e g n o i t c n u f e h T . s t c e j b o r e h t o h t i w s p i h s n o i t a l e r l a r u t c u r t s e n i m r e t e d d n a s e i t r e p o r p

m e h t n e e w t e b s n o i t a l e r e h t d n a F d n a D s t p e c n o c l a c i t y l a n a e h t s e t a r e n e

g - R .Possibleaggregation

e h t r o f d e n i f e d e r a s n o i t c n u

f analytica lconceptsactingasani ndicator :keyattributesareaddedwith n

o n r o f e l b a l i a v a e r a s n o i t c n u f n o i t a g e r g g a " l l a " d n a , " t n u o c " n o i t c n u

f -key attributes .In the

) v ( t n e r a P t e g : d e l l a c e r a s n o i t c n u f e c i v r e s f o r e b m u n a , m h t i r o g l a e h t f o n o i s s e r g o r

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[ PenkovaT. ,KorobkoA .Constructingt heI ntegra lOLAP-Modelf orScientificActivitiesBasedon . s n o i t a c i l p p A h t i w g n i t u p m o C e c i t t a L d n a g n i n r a e L e n i h c a M , g n i r e e n i g n E e g d e l w o n K / / A C F

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References

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