CN111459472A

CN111459472A - Model element visual expression method for MBSE (Multi-Block se) graphical modeling software

Info

Publication number: CN111459472A
Application number: CN202010251945.6A
Authority: CN
Inventors: 刘玉生; 庾龙鑫
Original assignee: Hangzhou Huawang System Technology Co ltd
Current assignee: Hangzhou Huawang System Technology Co ltd
Priority date: 2020-04-01
Filing date: 2020-04-01
Publication date: 2020-07-28
Anticipated expiration: 2040-04-01
Also published as: CN111459472B

Abstract

The invention discloses a visual expression method of model elements for MBSE (multi-level template analysis) graphic modeling software, which comprises the following steps of taking an annotation object as an attribute of an UM L DI element, embedding annotation graphic style information into an UM L DI element to enable the UM L DI element to have visual graphic semantics, and enabling the UM L DI element to have hierarchical consistency with the model elements by characterizing the structural relationship organization of a parent and a child.

Description

Model element visual expression method for MBSE (Multi-Block se) graphical modeling software

Technical Field

The invention relates to the field of graphic design of system engineering (MBSE) graphic modeling software based on a model, in particular to a visual expression method of model elements for MBSE graphic modeling software.

Background

With the rapid development of the current social science and technology, a single simple design mode in the past cannot meet the design requirements of the current increasingly complex products, and the complex relationships among subsystems and components in the system cannot be effectively organized to express the mutual relationships. To meet the design requirements of such complex products, a mature set of methodologies, system engineering, is used to design the products.

The model-based system engineering modeling is one of the important tools for designing complex products nowadays, and the systematic model modeling can replace the original document-based product design, so that the design process becomes more scientific and reliable.

However, the model semantics of the system engineering graphical modeling software are extremely complex, and the extremely complex model semantics need to be visually expressed while ensuring that the user can interact more complexly. The visual expression requires that the graph meets certain specifications, and in order to ensure the operation friendliness of the user, a simpler and more convenient interaction means from the graph to the model needs to be provided for the user. Therefore, to realize the visual expression of the system model, a set of controlled graphic elements with model semantics must be realized.

The OMG organization provides a set of referential visualization criteria for this type of modeling platform, namely UM L, UM L DI, and Notation, respectively.

UM L is the core of modeling, represents the core semantic meaning of modeling, and is the basis of SysM L, which is the most widely used modeling language in model-based system modeling at present, when a model file is exported, UM L information is needed, and the model file conforming to UM L standard can interact with other similar modeling platforms.

UM L DI is the subject of UM L visualization and is the most direct graphic element, and each UM L DI element in the OMG standard will correspond to one UM L element, but not each UM L element will correspond to one UM L DI element, the UM L DI element is the direct object of the user's operation when graphically modeling, so it graphically expresses part of the model semantics and is a graphic element with semantic information.

UM L DI has only logical semantic information at the graphical level, and related graphical style information is expressed by Notification, such as graphical position, line style, fill color, font, etc. compared to UM L DI and UM L, which serve system engineering modeling semantics, Notification is universally applicable to various graphical interfaces, therefore, while UM L DI is the graphical basis of UM L, only after being combined with Notification can the visual representation of UM L be really completed.

Disclosure of Invention

The invention aims to provide a visual expression method of model elements for MBSE (multi-component modeling and modeling) graphical modeling software, which solves the problem of how to combine the semantics of the graphical elements and the model elements and realize the visual expression of graphical element controls.

The technical scheme of the invention is as follows:

a visual expression method of model elements for MBSE graphical modeling software is characterized by comprising the following steps:

embedding the Notation graphic style information into the UM L DI element by taking the Notation object as the attribute of the UM L DI element, so that the UM L DI element has visual graphic semantics;

the UM L DI element is made to have hierarchical consistency with model elements by characterizing the parent-child structural relationship organization.

Preferably, the characterizing the parent-child structure relationship includes:

and adding a set of characterized attribute variables in the owendelement attribute of the graphic element, wherein the attribute variables comprise whether to synchronize to the backend, move along with the father node and delete along with the father node.

When a graphic element is inserted into an owedlement attribute, an attribute variable value needs to be set, and the attribute variable value cannot be changed after being initialized and is in a read-only format.

adding an attribute variable for managing back reference in the owedElement attribute of the graphic element, wherein the attribute variable is whether the attribute variable is a child, and when the attribute variable is referred back, the attribute variable value of whether the attribute variable is a child is set to be negative.

Preferably, when a reverse reference of a graphic element is stored to the owedrelement attribute, the reference attribute name of other graphic elements that reference the graphic element is also recorded.

Compared with the prior art, the invention has the beneficial effects that:

according to the visual expression method of the model element oriented to the MBSE graphical modeling software, provided by the invention, UM L DI element has visual graphical semantics by combining UM L DI and specification, and UM L DI element has hierarchical consistency with the model element by characterizing parent-child structural relationship organization.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a diagram illustrating relationships between UM L, UM L DI and Notation according to an embodiment;

fig. 2 is a schematic structural diagram of a characterized parent-child structural relationship organization provided by an embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

The graphical visualization mainly uses UM L DI and Notification, and a certain degree of pruning and expansion are carried out on UM L DI and Notification when the modeling software is specifically designed, so that UM L DI and Notification have a visualization basis in order to adapt the pruned and expanded UM L DI and Notification to graphical MBSE modeling based on SysM L, the invention provides a model element visual expression method facing the MBSE graphical modeling software, and ensures the interoperability of UM L DI and UM L by designing a set of UM L DI and Notification combination mode.

The visual expression method of the model element of the MBSE graphic modeling software comprises two parts, wherein the first part is one-way holding of UM L DI and Notation, namely, the UM L DI element is taken as a main part, and Notation graphic style information is embedded into the UM L DI element in UM L DI elements with different types and different abstract levels, so that the UM L DI element has visual graphic semantics, the second part is hierarchical semantic organization consistent with SysM L/UM L in UM L DI, namely, the UM L DI element has hierarchical consistency with the model element by characterizing the relationship organization of a parent-child structure.

First, embed Notation element in UM L DI element

Native UM L DiagramElement of UM L DI also mentions the attribute of bounds representing graphics style, however UM L DI itself has no normative definition for this type of style attribute, only some brief descriptions, so OMG mentions that Notation needs to be supplemented as a style.

It should be noted that, the implementation of the annotation in the present invention is not implemented in the EMF-like manner like UM L DI, that is, the annotation has no ID handle identifier, no resource pool, and no parent-child hierarchical relationship, mainly because the service scene of the part of the annotation object is very simple, only represents the style of a certain graphic element, there is no cross reference, and there is no special logical semantic, so that there is no mechanism for implementing resource pool-like organization, and the annotation object is organized in a discrete state, that is, the annotation object is treated as a discrete object.

Second part, hierarchical semantic organization of UM L DI consistent with SysM L/UM L

All graphical elements may be logically organized as a tree, with the parent-child relationships between elements being among the most critical ones. Since the graph is essentially used to show the models, in order to better represent the relationships between the models, it is necessary to give logical relationships consistent with the model elements on the graph for visual expression.

In practice, in a business scenario, many modifications are made to the standard UM L DI object of OMG, enriching the meaning of the concept of "child nodes", thereby also complicating the logical hierarchy and thus the simple parent-child structure is not satisfactory.

In order to solve the problem that the simple parent-child structure cannot meet the complication of the logic hierarchy structure, the invention provides that the owedelement attribute of the image element is modified to add the characterized attribute variable, namely, the UM L DI element has hierarchy consistency with the model element by the relationship organization of the characterized parent-child structure.

As shown in FIG. 2, specifically, each graphic element in the owedElement attribute is appended with a corresponding set of characterized attribute variables that are used to indicate the semantic action of a given child element under a parent element, including IsSerialize-whether to synchronize to the back end, ByMove-whether to move with the parent node, ByDelete-whether to delete with the parent node, and so on. When inserting a graphic element into an owedmelement attribute, the attribute variable values can be specified, and are read-only and can not be changed once initialized.

Although the graphic element logic is generally organized in a tree structure, in fact, there are many indirect references, such as the source and target attributes of edge pointing to other shape elements, and edge not being a child of those shape elements, which results in the whole logic structure tending to be a sparse mesh structure. The two attributes of owedmetement and oweningelement maintain the parent-child structure, so that the parent element and the child element can trace back each other, but only one-way reference exists for the indirect reference relation similar to source and target, and the mesh structure is not firm.

In order to implement this two-way tracing of indirect references, the present invention must maintain a back-reference property on the referenced party. It should be noted here that many of these business scenarios requiring back-references are consistent with the business scenarios of parent-child elements (with concomitant deletions as mentioned in the foregoing example), so the back-references and parent-child references are herein integrated, i.e., all back-references are present in the owedelement element. In order to distinguish these back-reference elements in the owedelevent from the common sub-elements, the attribute variable Ischild thereof is set to false, and the other attribute variables are compatible with processing.

Certainly, there is a relatively personalized business logic, so when there is a reverse reference to the owedlement, the name of the reference attribute of the element that references it is also recorded, so that it can be determined in what logic the element is referenced by other elements, and in a required business scenario, the owedlement can be traversed to obtain all the relevant elements that reference it.

The visual expression method of the model element of the MBSE (modeling system for modeling) oriented graphic provided by the embodiment has the advantages that the UM L DI element has visual graphic semantics by combining UM L DI and specification, and the UM L DI element has hierarchical consistency with the model element by characterizing the parent-child structural relationship organization.

The above-mentioned embodiments are intended to illustrate the technical solutions and advantages of the present invention, and it should be understood that the above-mentioned embodiments are only the most preferred embodiments of the present invention, and are not intended to limit the present invention, and any modifications, additions, equivalents, etc. made within the scope of the principles of the present invention should be included in the scope of the present invention.

Claims

1. A visual expression method of model elements for MBSE graphical modeling software is characterized by comprising the following steps:

2. The visual representation method of model elements for MBSE graphical modeling software of claim 1, wherein the annotation objects are organized in discrete states.

3. The visual representation of model elements for MBSE graphical modeling software of claim 1, wherein UM L DI objects have independent IDs and can be uniformly managed without direct object references held between UM L DI objects.

4. The visual representation of model elements for MBSE graphical modeling software of claim 1, wherein most of the actions of the UM L DI element are conducted recursively towards the child elements.

5. The visual representation method of model elements for MBSE graphical modeling software of claim 1, wherein the characterizing parent-child structural relationships comprises:

6. The visual expression method of model elements oriented to MBSE graphic modeling software of claim 5, wherein when graphic elements are inserted into an owedElement attribute, an attribute variable value needs to be set, and the attribute variable value cannot be changed after being initialized and is in a read-only format.

7. The visual representation method of model elements for MBSE graphical modeling software according to claim 1 or 5, wherein the characterizing parent-child structural relationships comprises:

8. The visual representation method of model elements oriented to MBSE graphic modeling software of claim 7, wherein when the backward reference of a graphic element to an owedElement attribute is stored, the name of a reference attribute of other graphic elements referring to the graphic element is also recorded.