CN110516079A - A kind of RDF object model class hierarchy tree method for building up and system - Google Patents
A kind of RDF object model class hierarchy tree method for building up and system Download PDFInfo
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Abstract
The embodiment of the invention discloses a kind of RDF object model class hierarchy tree method for building up and systems, original model based on RDF can be defined to the class hierarchy tree for being converted to object model, the inheritance of class can clearly and intuitively be depicted, be conducive to the further expansion of knowledge model.Class hierarchy tree can be shown by way of electrical form, so that the Similar integral relation table of graph structure be formatted, form two-dimensional patterned hierarchical tree structure.The class hierarchy tree construction of tabular, on the one hand, help have a clearer understanding to the inheritance of class in model using the enterprise and individual of model, to deeply understand rdf model itself；On the other hand, by means of the hierarchical tree of tabular, help to be extended the definition of original model, by newly-increased, modification and the model extension of spreadsheet line and cell mark completion based on hierarchical tree can be deleted, to serve the application and popularization of rdf model.
Description
Technical field
The present embodiments relate to the representations of knowledge of knowledge mapping and Model Extension technical field, and in particular to a kind of RDF
Object model class hierarchy tree method for building up and system.
Background technique
RDF (Resource Description Framework, resource description framework) is a kind of for describing network
Information and resource markup language, for semantic net provide description resource unified standard.Currently, internal and international universal
Using indicating knowledge based on the relevant technologies of RDF, and business scope knowledge is modeled.RDF is known using graph structure expression
Know, wherein the inheritance (rdfs:subClassOf) between class (rdfs:Class) and class is graph structure, is existed in graph structure
Staggered cyberrelationship, when there are the successions that feature and relationship when the case where more parents, cannot intuitively be depicted to come for a class
Source situation.Therefore, it before being extended to knowledge model, needs to rely on business expert and carries out relevant analysis work, be mould
Type extension increases difficulty.
Summary of the invention
For this purpose, the embodiment of the present invention provides a kind of method for building up of RDF object model class hierarchy tree, to solve the prior art
Middle rdf model defines the inheritance that class cannot intuitively be depicted, and knowledge model expands the big problem of difficulty.
To achieve the goals above, the embodiment of the present invention provides the following technical solutions:
According to a first aspect of the embodiments of the present invention, a kind of RDF object model class hierarchy tree method for building up is provided, it is described
Method includes:
RDF object model definition file is traversed, model is obtained and defines the class in file；
According to the inheritance information between class, i-th of class C is obtainedi(x) parent Cj(y), when getting parent Cj(y)
When, enable y=y+x+1 update y value, it be 0, i is more than or equal to 1 and to be less than or wait that x, y, which are the initial value of positive integer and x, y,
In the positive integer of the sum of class；
By class Ci(x) and its subclass is as its parent Cj(y) subtree branch is shown in electrical form, generates table
The class hierarchy tree formatted, wherein x, y are respectively Ci(x) and Cj(y) where in subtree branch subclass quantity.
Further, the method specifically includes:
Newly-built electrical form, by C1(0)、C2(0)、……、Cn(0) it is sequentially inserted into from top to bottom to electrical form first row
Each unit lattice in, wherein n is that the sum of class and n are positive integer more than or equal to 1；
Multiple traversal loop is carried out by sequence from bottom to top to the items in electrical form first row, every time when traversal only
Traversal x value class C identical with the value that current traversal number subtracts onei(x) and class C is obtainedi(x) parent.
Further, the process traversed every time specifically includes:
By sequence from bottom to top, the value phase that x value subtracts one with current traversal number in electrical form first row is successively obtained
Same class Ci(x) parent Cj(y)；
When getting parent Cj(y) when, y=y+x+1 is enabled to update y value, and in current Cj(y) x is newly inserted into lower section of the row
+ 1 row, by class Ci(x) and its x subclass entirety holding position relationship of place cell lower right is inserted into Cj(y) single where
In x+1 row of first lattice lower right.
Further, the process traversed every time further include:
As parent Cj(y) it is acquired and y value is made to be updated to y1When, obtain Cj(y) all parent C of subtree branch wherek
(z), z=z+ (y is enabled1- y) update z value.
Further, by class Ci(x) and its x subclass entirety holding position relationship of place cell lower right is inserted into
Cj(y) after in x+1 row of place cell lower right, further includes:
By former Ci(x) x+1 row and its where x subclass of place cell lower right is deleted.
Further, the method also includes:
When parent is not present in classes all in this ergodic process, terminate traversal loop.
Further, RDF object model definition file is traversed, model is obtained and defines the class in file, comprising:
By extracting title of the local identifier as class in the internationalized resource identifier IRI of the class.
According to a second aspect of the embodiments of the present invention, it provides a kind of RDF object model class hierarchy tree and establishes system, it is described
System includes:
Class obtains module, for traversing RDF object model definition file, obtains model and defines the class in file；
Parent obtains module, for obtaining i-th of class C according to the inheritance information between classi(x) parent Cj(y),
When getting parent Cj(y) when, y=y+x+1 is enabled to update y value, x, y be positive integer and x, y initial value be 0, i be greater than
Or the positive integer of the sum equal to 1 and less than or equal to class；
Class hierarchy tree generation module is used for class Ci(x) and its subclass is as its parent Cj(y) subtree branch is in electronics
It is shown in table, generates the class hierarchy tree of tabular, wherein x, y are respectively Ci(x) and Cj(y) subtree branch neutron where
The quantity of class.
According to a third aspect of the embodiments of the present invention, a kind of computer storage medium is provided, the computer storage is situated between
Comprising one or more program instructions in matter, one or more of program instructions are used for by a kind of RDF object model class hierarchy
Tree establishes system and either executes in a kind of as above RDF object model class hierarchy tree method for building up method step.
The embodiment of the present invention, which has the advantages that, can be converted to original model definition based on RDF based on electronics
The class hierarchy tree of the object model of table forms two-dimensional patterned class so that the Similar integral relation table of graph structure be formatted
Hierarchical tree structure.The class hierarchy tree construction of tabular, on the one hand, facilitate enterprise and individual using model to class in model
Inheritance has a clearer understanding, to deeply understand rdf model itself；On the other hand, by means of the layer of tabular
Secondary tree helps to be extended the definition of original model, can pass through newly-increased, modification and delete spreadsheet line and cell mark
The model extension based on hierarchical tree is completed, to serve the application and popularization of rdf model.
Detailed description of the invention
It, below will be to embodiment party in order to illustrate more clearly of embodiments of the present invention or technical solution in the prior art
Formula or attached drawing needed to be used in the description of the prior art are briefly described.It should be evident that the accompanying drawings in the following description is only
It is merely exemplary, it for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer, which is extended, obtains other implementation attached drawings.
Fig. 1 is a kind of flow diagram for RDF object model class hierarchy tree method for building up that the embodiment of the present invention 1 provides；
Fig. 2 is a kind of traversal loop process for RDF object model class hierarchy tree method for building up that the embodiment of the present invention 1 provides
Schematic diagram；
Fig. 3 is the structural schematic diagram that a kind of RDF object model class hierarchy tree that the embodiment of the present invention 2 provides establishes system.
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book is understood other advantages and efficacy of the present invention easily, it is clear that described embodiment is the present invention one
Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
As shown in Figure 1, the embodiment of the present invention 1 proposes a kind of RDF object model class hierarchy tree method for building up, this method packet
Include following steps:
Step 110, traversal RDF object model definition file, obtain model and define the class in file.
Defined in RDF object model definition file (being set as " orgRDF ") between class (rdfs:Class) and class after
Hold relationship (rdfs:subClassOf), defined by model between class and class all in the available file of file after
Hold relation information.Further, can by extracting title of the local identifier as class in the internationalized resource identifier IRI of class,
It is set to C1、C2、……、Cn。
Step 120, according to the inheritance information between class, obtain i-th of class Ci(x) parent Cj(y), when getting
Parent Cj(y) when, y=y+x+1 is enabled to update y value, it be 0, i is more than or equal to 1 that x, y, which are the initial value of positive integer and x, y,
And it is less than or equal to the positive integer of the sum of class.
Step 130, by class Ci(x) and its subclass is as its parent Cj(y) subtree branch is opened up in electrical form
Show, generates the class hierarchy tree of tabular, wherein x, y are respectively Ci(x) and Cj(y) where in subtree branch subclass quantity.
Original model based on RDF can be defined by this method and be converted to the object model based on electrical form
Class hierarchy tree, so that the Similar integral relation table of graph structure is formatted, as shown in Fig. 2, concrete implementation process is as follows:
(1) firstly, creating an electrical form, it is denoted as " newTree "；
(2) secondly, electrical form is created, by C1(0)、C2(0)、……、Cn(0) it is sequentially inserted into from top to bottom to electronic watch
In each unit lattice of lattice first row, wherein n is the sum of class and n is the positive integer more than or equal to 1；
(3) multiple traversal loop is carried out by sequence from bottom to top to the items in electrical form first row, traversed every time
When only traverses x value class C identical with the value that current traversal number subtracts onei(x) and class C is obtainedi(x) parent.
Illustratively, in traversal, if the 1st traversal, then only traversing title in table first row includes " (0) "
Class then only traverses the class that title in table first row includes " (1) " if the 2nd traversal.
Further, the process traversed every time specifically includes: by sequence from bottom to top, successively obtaining electrical form first
X value class C identical with the value that current traversal number subtracts one in columni(x) parent Cj(y)；When getting parent Cj(y) when, y is enabled
=y+x+1 updates y value, and in current Cj(y) x+1 row is newly inserted into lower section of the row, by class Ci(x) and its place cell
X subclass entirety holding position relationship of lower right is inserted into Cj(y) where in x+1 row of cell lower right.
To Ci(x) in processing, according to the C inquiredi(x) whole parents are successively executed with up-conversion step, until
Current Ci(x) and its relevant hierarchical tree conversion process of all parents finishes, and according to sequence from bottom to top, handles table the
Numerical value class identical with the value that current traversal number subtracts one in one column in bracket contained by other titles, does same hierarchical tree and becomes
Processing is changed, until the class identical with the value that current traversal number subtracts one of the numerical value in all brackets is disposed, is then entered
Ergodic process next time.
Further, by class Ci(x) and its x subclass entirety holding position relationship of place cell lower right is inserted into
Cj(y) after in x+1 row of place cell lower right, further includes: by former Ci(x) and its x of place cell lower right is a
X+1 row where subclass, which is deleted, (deletes " C before the transformation of this table nodei(x) " row and its where subclass).
Further, the process traversed every time further include: as parent Cj(y) it is acquired and y value is made to be updated to y1When, it obtains
Take Cj(y) all parent C of subtree branch wherek(z), z=z+ (y is enabled1- y) update z value.
Illustratively, it is assumed that electrical form first row is followed successively by C from top to bottom1(0)、C2(0)、C3(0), and meet relationship
C1For C2Subclass, C2It is C3Subclass traverse C first in first time ergodic process3(0), C3There is no parent, then skips；
Traverse C2(0), class C is inquired2Parent be C3, then C3(0) it is updated to C3(1), by C2(0) it is inserted into C3(1) unit where
The lower right of lattice, and delete former C2(0) it is expert at；Continue to traverse class C1(0), class C is inquired1Parent be C2, then C2(0) more
It is newly C2(1), and by C1(0) it is inserted into C2(1) lower right of cell where, and delete former C1(0) it is expert at, simultaneously because C2
Value in bracket is updated to 1 by 0, then C2Parent C3Value in bracket is updated to 2, i.e. C according to 1+ (1-0)=23(1) it is updated to
C3(2)。
Further, after repeatedly traversing, when parent is not present in classes all in this ergodic process, end time
Go through circulation.
Illustratively, in order to better illustrate this method, it is assumed that there are three classes in RDF object model definition file, point
It Wei not C1、C2、C3, wherein C2It is C1Subclass, C3It is C2Subclass, define the description in file " orgRDF.owl " such as in model
Under:
<owl:Class rdf:about=" http://rdf.to.excel_tree/class#C1 ">
</owl:Class>；
<owl:Class rdf:about=" http://rdf.to.excel_tree/class#C2 ">
<rdfs:subClassOf rdf:resource="http://rdf.to.excel_tree/class#C1"/>
</owl:Class>；
<owl:Class rdf:about=" http://rdf.to.excel_tree/class#C3 ">
<rdfs:subClassOf rdf:resource="http://rdf.to.excel_tree/class#C2"/>
</owl:Class>。
A, electronic form file " newTree.xls " is created, after step 110, electrical form is as follows:
| 1 | 2 | 3 |
| C1(0) | ||
| C2(0) | ||
| C3(0) |
B, the 1st time from bottom to top traversal electrical form the 1st column in label contain " (0) " class, traverse " C first3(0) ",
It gets model and defines C in file3Parent be C2, while C2There is corresponding mark " C in electrical form2(0) " it, is marked
Note is by " C2(0) " it is revised as " C2(1) ", and " C will be marked3(0) " insertion mark " C2(1) " lower right of cell, is deleted simultaneously
Original mark " C3(0) " spreadsheet line where obtains electrical form as shown below:
| 1 | 2 | 3 |
| C1(0) | ||
| C2(1) | ||
| C3(0) |
C, the traversal for continuing the 1st time, finds " C1, but C (0) "1There is no parents, therefore terminate the 1st time traversal；
D, the 2nd time from bottom to top traversal electrical form the 1st column in label contain " (1) " class, traverse " C2(1) " it, obtains
C in file is defined to model2Parent be C1, while C1There is mark " C in electrical form1(0) " it, is marked by " C1(0)”
It is revised as " C1(2) ", and " C will be marked2(1) " and its bottom right subclass marks " C3(0) " holding position relationship is integrally inserted into mark
“C1(2) " in two newline of lower right of cell, while original mark " C is deleted2(1) " and its bottom right subclass marks " C3(0) " institute
Spreadsheet line, obtain electrical form as shown below:
By above step, completes and file " orgRDF.owl " to " newTree.xls " electrical form is defined by model
The foundation of class hierarchy tree.This method, by the rdf model of Machine oriented define in father's subclass relation, being converted into can be intuitive for people
The visualization table class hierarchy tree understood is read, is closed so as to easily understand the succession that model defines in file between class and class
System is conducive to the application and extension of model.
Illustratively, another example applied in practical field of the embodiment of the present invention 1 is as follows:
3 national standards such as " digital content objects storage, multiplexing and exchange specification part 1s: object model " are being drafted
In the process, standard draft group to domestic exoadaptation industry the relatively wide, correlation model with appropriate level of abstraction carried out it is detailed
Investigation learns and uses the idea and methods such as conceptual abstraction therein, modelling, extension mechanism, case study, proposes
A set of ontology model for adapting to multi-field more resource types, the ontology model are named as DCOO (Digital Content
Object Ontology), the object model that DCOO model proposes is the model definition based on RDF, is suitable for journalism
Industry, library and the formalization representations of the fields in relation to digital content resource such as museum use the present invention when drafting the specification
RDF object model class hierarchy tree method for building up mentioned by embodiment, can intuitively, accurately and efficiently realize the class of object model
The tabular expression of hierarchical relationship, as a result as shown in the table:
The hierarchical relationship of table D COO class
After the definition of DCOO model is expressed as class hierarchy tree shown in upper table, is on the one hand conducive to human eye and intuitively understands RDF
On the other hand the inheritance hierarchy relationship between class and class in model provides convenience and is easy to for the application and extension of model
The tabular basis of understanding.
A kind of RDF object model class hierarchy tree method for building up that the embodiment of the present invention proposes can be based on RDF for original
Model define the class hierarchy tree for being converted to the object model based on electrical form, thus by the Similar integral related table of graph structure
Change, forms two-dimensional patterned hierarchical tree structure.The class hierarchy tree construction of tabular, on the one hand, facilitate using model
Enterprise and individual have a clearer understanding to the inheritance of class in model, to deeply understand rdf model itself；It is another
Aspect helps to be extended the definition of original model by means of the hierarchical tree of tabular, can pass through newly-increased, modification and delete
Spreadsheet line and cell mark complete the model extension based on hierarchical tree, to serve the application and popularization of rdf model.
It is corresponding with above-described embodiment 1, as shown in figure 3, the embodiment of the present invention 2 proposes a kind of RDF object model class
Hierarchical tree establishes system, which includes:
Class obtains module 210, for traversing RDF object model definition file, obtains model and defines the class in file；
Parent obtains module 220, for the inheritance information according to class, obtains i-th of class Ci(x) parent Cj(y),
When getting parent Cj(y) when, y=y+x+1 is enabled to update y value, it be 0, i is big that x, y, which are the initial value of positive integer and x, y,
In or equal to 1 and be less than or equal to class sum positive integer；
Class hierarchy tree generation module 230 is used for class Ci(x) and its subclass is as its parent Cj(y) subtree branch is in electricity
It is shown in sub-table, generates the class hierarchy tree of tabular, wherein x, y are respectively Ci(x) and Cj(y) where in subtree branch
The quantity of subclass.
A kind of RDF object model class hierarchy tree provided in an embodiment of the present invention establishes function performed by each component in system
It is discussed in detail in above-described embodiment 1, therefore does not do excessively repeat here.
A kind of RDF object model class hierarchy tree that the embodiment of the present invention proposes establishes system, can be based on RDF for original
Model define the class hierarchy tree for being converted to the object model based on electrical form, thus by the Similar integral related table of graph structure
Change, forms two-dimensional patterned hierarchical tree structure.The class hierarchy tree construction of tabular, on the one hand, facilitate using model
Enterprise and individual have a clearer understanding to the inheritance of class in model, to deeply understand rdf model itself；It is another
Aspect helps to be extended the definition of original model by means of the hierarchical tree of tabular, can pass through newly-increased, modification and delete
Spreadsheet line and cell mark complete the model extension based on hierarchical tree, to serve the application and popularization of rdf model.
Corresponding with above-described embodiment, the embodiment of the present invention 3 provides a kind of computer storage medium, computer storage
Comprising one or more program instructions in medium, one or more program instructions are used for by a kind of RDF object model class hierarchy tree
The system of foundation executes method as above.
Although above having used general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention are fallen within the scope of the claimed invention.
Claims (9)
1. a kind of RDF object model class hierarchy tree method for building up, which is characterized in that the described method includes:
RDF object model definition file is traversed, model is obtained and defines the class in file；
According to the inheritance information between class, i-th of class C is obtainedi(x) parent Cj(y), when getting parent Cj(y) when,
Y=y+x+1 is enabled to update y value, it be 0, i is more than or equal to 1 and to be less than or equal to that x, y, which are the initial value of positive integer and x, y,
The positive integer of the sum of class；
By class Ci(x) and its subclass is as its parent Cj(y) subtree branch is shown in electrical form, generates tabular
Class hierarchy tree, wherein x, y are respectively Ci(x) and Cj(y) where in subtree branch subclass quantity.
2. a kind of RDF object model class hierarchy tree method for building up according to claim 1, which is characterized in that the method
It specifically includes:
Newly-built electrical form, by C1(0)、C2(0)、……、Cn(0) it is sequentially inserted into from top to bottom each to electrical form first row
In cell, wherein n is the sum of class and n is the positive integer more than or equal to 1；
Multiple traversal loop is carried out by sequence from bottom to top to the items in electrical form first row, is only traversed when traversal every time
X value class C identical with the value that current traversal number subtracts onei(x) and class C is obtainedi(x) parent.
3. a kind of RDF object model class hierarchy tree method for building up according to claim 2, which is characterized in that traversal every time
Process specifically include:
By sequence from bottom to top, it is identical with the value that current traversal number subtracts one successively to obtain x value in electrical form first row
Class Ci(x) parent Cj(y)；
When getting parent Cj(y) when, y=y+x+1 is enabled to update y value, and in current Cj(y) lower section of the row is newly inserted into x+1
Row, by class Ci(x) and its x subclass entirety holding position relationship of place cell lower right is inserted into Cj(y) cell where
In x+1 row of lower right.
4. a kind of RDF object model class hierarchy tree method for building up according to claim 3, which is characterized in that traversal every time
Process further include:
As parent Cj(y) it is acquired and y value is made to be updated to y1When, obtain Cj(y) all parent C of subtree branch wherek(z),
Enable z=z+ (y1- y) update z value.
5. a kind of RDF object model class hierarchy tree method for building up according to claim 3, which is characterized in that by class Ci(x)
And its x subclass entirety holding position relationship of place cell lower right is inserted into Cj(y) x+1 of cell lower right where
After in a row, further includes:
By former Ci(x) x+1 row and its where x subclass of place cell lower right is deleted.
6. a kind of RDF object model class hierarchy tree method for building up according to claim 2, which is characterized in that the method
Further include:
When parent is not present in classes all in this ergodic process, terminate traversal loop.
7. a kind of RDF object model class hierarchy tree method for building up according to claim 1, which is characterized in that RDF pairs of traversal
As model defines file, obtains model and defines the class in file, comprising:
By extracting title of the local identifier as class in the internationalized resource identifier IRI of the class.
8. a kind of RDF object model class hierarchy tree establishes system, which is characterized in that the system comprises:
Class obtains module, for traversing RDF object model definition file, obtains model and defines the class in file；
Parent obtains module, for obtaining i-th of class C according to the inheritance information between classi(x) parent Cj(y), when obtaining
Get parent Cj(y) when, y=y+x+1 is enabled to update y value, it be 0, i is to be greater than or wait that x, y, which are the initial value of positive integer and x, y,
In 1 and be less than or equal to class sum positive integer；
Class hierarchy tree generation module is used for class Ci(x) and its subclass is as its parent Cj(y) subtree branch is in electrical form
In be shown, generate the class hierarchy tree of tabular, wherein x, y are respectively Ci(x) and Cj(y) subclass in subtree branch where
Quantity.
9. a kind of computer storage medium, which is characterized in that refer in the computer storage medium comprising one or more programs
It enables, one or more of program instructions, which are used to be established system by a kind of RDF object model class hierarchy tree, executes such as claim
Method described in any one of 1-7.
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| IL280372A (en) * | 2021-01-24 | 2022-08-01 | Wp Semantix Ltd | System and method for implementing ontologies in sql |
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