CN111783397B - Localization coding method, device and storage medium of AIXM data structure - Google Patents
Localization coding method, device and storage medium of AIXM data structure Download PDFInfo
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Abstract
The invention discloses a method, a device and a storage medium for native coding of an AIXM data structure, wherein the method carries out deletion, modification and attribute redefinition of entity, attribute and data type on the AIXM coding based on the native aviation entity and the relation thereof on the basis of the existing standard AICM, thereby realizing AIXM native coding of the aviation entity, enabling a set of standard AICM to be applicable to AIS requirements of different countries, reducing the burden of an aviation information system, and realizing the special coding requirements of the national aviation information element while ensuring the information exchange efficiency and reliability of the national AIS system and other national AIS system on the premise of ensuring the unification of data formats.
Description
Technical Field
The invention belongs to the technical field of AIXM data processing, and particularly relates to an AIXM data structure localization method.
Background
The aviation information exchange model (Aeronautical Information Exchange Mode, AIXM) is a standard for realizing the data exchange of each aviation element in aviation information service, and is the basis of global aviation information expression, storage and interaction. The aviation information exchange model comprises an AICM and an AIXM, the source technology of the AICM is UML, and the model for describing aviation element entity, relationship and time enables project participants to exchange and understand managed information and is the basis of data structures in aviation element coding; the source technology of AIXM is XML, which is a standard for data encoding of aviation entities, and aviation data is stored and managed in AIXM data format so that a computer can send and receive information.
The AIXM is used for providing a practical aviation data and exchange format model in the global scope, and the model can not only improve a national Aviation Information Service (AIS) system, but also realize information exchange between the national AIS system and other national AIS systems. As the method is globalization-oriented, all possible attributes of aviation elements are defined, but the burden of an aviation information system is increased, and meanwhile, even if the definition of each country of the same heading element on the element attribute is different, for example, a roadbed navigation station 'very high frequency omni-directional beacon VOR' commonly used by civil aviation is provided in a standard AIXM model, the attribute of 'service range' is provided based on the idioms of European and American countries on the VOR attribute, and China does not define the attribute on the VOR.
Therefore, the feasibility of further localization of AIXM is researched, the technical flow of localization of AIXM is generalized, the method has great significance for improving the AIS system of the home country, and no people or institutions have proposed at present for localization of AIXM data standards.
Disclosure of Invention
In order to overcome the above disadvantages in the prior art, the present invention provides a localization encoding method, apparatus and readable storage medium for an AIXM data structure, which solve the above problems in the background art.
In order to achieve the aim of the invention, the invention adopts the following technical scheme: the method for encoding the AIXM data structure by the localization method comprises the steps of deleting, modifying and redefining the entity, the attribute and the data type of the AIXM encoding according to the type and the attribute of a native aviation entity on the basis of keeping the original AIXM data structure unchanged, and realizing the localization encoding of the AIXM data structure.
Further, according to the type and attribute of the native aviation entity, deleting, modifying and redefining the entity, attribute and data type of the AIXM coding, the method for realizing the localization coding of the AIXM data specifically comprises the following steps:
s1, determining a native aviation entity and judging whether the native aviation entity exists in a standard AICM;
if yes, enter step S2;
if not, entering step S6;
s2, judging the relation between the attribute of the native aviation entity and the entity attribute in the standard AICM;
if the attributes are consistent, the step S3 is carried out;
if the attribute of the native aviation entity is more than the entity attribute published in the standard AICM, entering step S4;
if the attribute of the native aviation entity is less than the entity attribute published in the standard AICM, entering step S5;
s3, judging whether the basic data types of the attribute of the native aviation entity exist in the standard AICM;
if yes, go to step S8;
if not, entering step S7;
s4, adding attribute codes of the attribute parts of the local aviation entity with more than the entity attributes in the standard AICM into Abstract Feature Extent elements of the local aviation entity AIXM, and entering step S3;
s5, reserving entity attributes which are the same as the attribute of the native aviation entity in the standard AICM, deleting entity attributes in the standard AICM which are more than the attribute of the native aviation entity, and entering step S3;
s6, searching an entity related to the native aviation entity, adding the integral attribute code of the entity into Abstract Feature Extent elements of the native aviation entity AIXM, and entering a step S3;
s7, adding data corresponding to the data types of the local aviation entities, which are more than the data types in the standard AICM, to the standard AICM, and entering step S8;
s8, based on the current local aviation entity AIXM and the local aviation entity information stored in the standard AICM, AIXM coding of the local aviation entity is carried out, and the localization coding of the AIXM data structure is achieved.
Further, the Abstract Feature Extent element is an element used for entity expansion in the entity-to-AIXM mapping rule.
Further, the basic data type in the step S3 includes a length unit and speed data.
Further, in the step S6, an entity related to the native aviation entity is found in the native aviation specification and in actual operation.
A localization encoding apparatus of an AIXM data structure, comprising:
the entity comparison module is used for comparing the native aviation entity with the entity stored in the standard AICM and modifying the native aviation entity AIXM according to the comparison result;
the entity attribute comparison module is used for comparing the attribute of the native aviation entity with the entity attribute stored in the standard AICM and modifying the entity attribute stored in the AIXM or the standard AICM corresponding to the native aviation entity according to the comparison result;
the entity data type comparison module is used for comparing the data type of the attribute of the local entity with the entity attribute data type stored in the standard AICM, and modifying the data type stored in the standard AICM for the AIXM coding of the local aviation entity according to the comparison result;
and the local aviation entity AIXM coding module is used for carrying out AIXM coding according to the current local aviation entity AIXM and the local aviation entity information stored in the standard AICM, so as to realize the localization coding of the AIXM data structure.
Further, in the entity comparison module, the method for modifying the local aviation entity AIXM according to the comparison result comprises the following steps: when the native aeronautical entity does not exist in the standard AICM, the entity related to the native aeronautical entity is found and the whole attribute code is added into Abstract Feature Extent element of the native aeronautical entity AIXM.
Further, in the entity attribute comparison module, the method for modifying the AIXM corresponding to the native aviation entity according to the comparison result is as follows: when the attribute of the local aviation entity is more than the entity attribute published in the standard AICM, adding an attribute code of a local aviation entity attribute part which is more than the entity attribute in the standard AICM into a Abstract Feature Extent element of the local aviation entity AIXM;
the method for modifying the entity attribute stored by the standard AICM according to the comparison result comprises the following steps: when the attribute of the native aviation entity is less than the entity attribute published in the standard AICM, the entity attribute which is the same as the attribute of the native aviation entity is reserved in the standard AICM, and the entity attribute in the standard AICM which is more than the attribute of the native aviation entity is deleted.
Further, in the entity data type comparison module, the method for modifying the data type stored in the standard AICM for native aviation entity AIXM coding according to the comparison result is as follows: when the basic data types of the attribute of the local aviation entity are more than those in the standard AICM, adding the data corresponding to the data types of the local aviation entity which are more than those in the standard AICM into the standard AICM.
A computer-readable storage medium storing a computer program executable instructions for causing a computer to perform the localization encoding method of the AIXM data structure described above.
The beneficial effects of the invention are as follows:
based on the existing standard AICM, the method of the invention deletes, modifies and redefines the entity, the attribute and the data type of AIXM codes based on the relationship between the native aviation entity and the AICM, thereby realizing the AIXM native coding of the aviation entity, enabling a set of standard AICM to be applicable to AIS requirements of different countries and reducing the burden of aviation information systems; the core purpose of the localization of AIXM in the invention is to make the AIXM better serve and the local aviation condition report through a certain adjustment under the condition of keeping the original data structure unchanged through the research of the standard AIXM. Therefore, on the premise of ensuring the unification of data formats, the information exchange efficiency and reliability of the national AIS system and the other national AIS system can be realized, and the special coding requirement of the national aviation information element can be realized.
Drawings
FIG. 1 is a flowchart of a localization encoding method of an AIXM data structure provided by the present invention.
Fig. 2 is a schematic diagram of a speed unit type AICM according to the present invention.
FIG. 3 is a diagram illustrating the localization stop track AIXM encoding provided by the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and all the inventions which make use of the inventive concept are protected by the spirit and scope of the present invention as defined and defined in the appended claims to those skilled in the art.
Example 1:
the method for encoding the AIXM data structure by the localization method comprises the steps of deleting, modifying and redefining the entity, the attribute and the data type of the AIXM encoding according to the type and the attribute of a native aviation entity on the basis of keeping the original AIXM data structure unchanged, and realizing the localization encoding of the AIXM data structure.
Specifically, as shown in fig. 1, the localization encoding method of the AIXM data structure in this embodiment specifically includes:
s1, determining a native aviation entity and judging whether the native aviation entity exists in a standard AICM;
if yes, enter step S2;
if not, entering step S6;
s2, judging the relation between the attribute of the native aviation entity and the entity attribute in the standard AICM;
if the attributes are consistent, the step S3 is carried out;
if the attribute of the native aviation entity is more than the entity attribute published in the standard AICM, entering step S4;
if the attribute of the native aviation entity is less than the entity attribute published in the standard AICM, entering step S5;
s3, judging whether the basic data types of the attribute of the native aviation entity exist in the standard AICM;
if yes, go to step S8;
if not, entering step S7;
s4, adding attribute codes of the attribute parts of the local aviation entity with more than the entity attributes in the standard AICM into Abstract Feature Extent elements of the local aviation entity AIXM, and entering step S3;
s5, reserving entity attributes which are the same as the attribute of the native aviation entity in the standard AICM, deleting entity attributes in the standard AICM which are more than the attribute of the native aviation entity, and entering step S3;
s6, searching an entity related to the native aviation entity, adding the integral attribute code of the entity into Abstract Feature Extent elements of the native aviation entity AIXM, and entering a step S3;
s7, adding data corresponding to the data types of the local aviation entities, which are more than the data types in the standard AICM, to the standard AICM, and entering step S8;
s8, based on the current local aviation entity AIXM and the local aviation entity information stored in the standard AICM, AIXM coding of the local aviation entity is carried out, and the localization coding of the AIXM data structure is achieved.
The standard AICM in step S1 of the present embodiment stores all the commonly used entities in the international aviation, but aviation in each country may store some differences, and some entities are not written into the international standard AICM, so we first need to compare the entity needing localization AIXM coding with the entity in the standard AICM, so as to modify the entity stored in the standard AICM based on the selectivity of the AIXM element, so as to facilitate the subsequent AIXM coding.
In step S2 of this embodiment, when judging the relationship between the attribute of the native aviation entity and the attribute of the entity in the standard AICM, the number of the attributes of the aviation entity in the standard AICM published according to the native aviation law is used as a criterion, and the number of the attributes of the native aviation entity is compared with the number of the attributes of the native aviation entity, and if the number of the attributes of the native aviation entity is greater than the number of the attributes of the entity in the AICM, the number of the attributes of the native aviation entity is less.
In this embodiment, the Abstract Feature Extent element is an element used for entity expansion in the mapping rule from an entity to an AIXM, when the element under study is not on an AICM diagram published by ICAO, the element may be expanded into an entity of an existing element according to a relationship between aviation elements, and finally encoded as an abstract part of the existing entity, and when the native aviation element is not defined by the AIXM, the AIXM encoding of the native aviation element may be implemented by adopting a method of expanding the entity or object associated with the native aviation element.
The basic data types in step S3 of the present embodiment include length units including meters, kilometers, seas, and feet, and speed data including kilometers per hour, knots, and meters per second.
In step S6 of this embodiment, the entity related to the native aviation entity found in actual operation is found in the standard AICM by searching for the entity related to the native aviation entity in the native aviation specification and in actual operation.
Example 2:
a localization encoding apparatus of an AIXM data structure, comprising:
the entity comparison module is used for comparing the native aviation entity with the entity stored in the standard AICM and modifying the native aviation entity AIXM according to the comparison result;
the entity attribute comparison module is used for comparing the attribute of the native aviation entity with the entity attribute stored in the standard AICM and modifying the entity attribute stored in the AIXM or the standard AICM corresponding to the native aviation entity according to the comparison result;
the entity data type comparison module is used for comparing the data type of the attribute of the local entity with the entity attribute data type stored in the standard AICM, and modifying the data type stored in the standard AICM for the AIXM coding of the local aviation entity according to the comparison result;
and the local aviation entity AIXM coding module is used for carrying out AIXM coding according to the current local aviation entity AIXM and the local aviation entity information stored in the standard AICM, so as to realize the localization coding of the AIXM data structure.
Specifically, in the entity comparison module, the method for modifying the local aviation entity AIXM according to the comparison result comprises the following steps: when the native aeronautical entity does not exist in the standard AICM, the entity related to the native aeronautical entity is found and the whole attribute code is added into Abstract Feature Extent element of the native aeronautical entity AIXM.
In the entity attribute comparison module, the method for modifying AIXM corresponding to the native aviation entity according to the comparison result comprises the following steps: when the attribute of the local aviation entity is more than the entity attribute published in the standard AICM, adding an attribute code of a local aviation entity attribute part which is more than the entity attribute in the standard AICM into a Abstract Feature Extent element of the local aviation entity AIXM;
the method for modifying the entity attribute stored by the standard AICM according to the comparison result comprises the following steps: when the attribute of the native aviation entity is less than the entity attribute published in the standard AICM, the entity attribute which is the same as the attribute of the native aviation entity is reserved in the standard AICM, and the entity attribute in the standard AICM which is more than the attribute of the native aviation entity is deleted;
in the entity data type comparison module, the method for modifying the data type stored in the standard AICM for the local aviation entity AIXM coding according to the comparison result comprises the following steps: when the basic data types of the attribute of the local aviation entity are more than those in the standard AICM, adding the data corresponding to the data types of the local aviation entity which are more than those in the standard AICM into the standard AICM.
Example 3:
a computer-readable storage medium storing a computer program, the computer program executable instructions for causing a computer to perform the localization encoding process of the AIXM data structure described above.
The computer readable storage medium in the present embodiment includes a structure having program storage reading capability such as RAM, ROM, and a single chip microcomputer chip.
Example 4: feasibility analysis of the method of the invention:
1. selectivity of AIXM element:
the AIXM ' time slice ' element encapsulates all information of the entity, and in the basic structure of the time slice in the track direction, the AIXM ' time slice ' element comprises attributes, effective time, a time model, attribute groups and extension elements of the entity, and the AIXM's requirement for aviation element coding is classified according to mandatory elements as shown in table 1:
table 1: mandatory element classification table
According to table 1, a part of elements constituting entity information in aixm are selectable. According to whether the mandatory requirement of the element is met, when the AIXM is applied to the local aviation information, the mandatory element must keep the structural relation among the determined AIXM data, and the non-mandatory element can be selected according to the actual application scene, so that the structure of the local aviation information system is simplified. The mandatory element and the optional element herein refer to constituent elements of a time slice in the entity encoding structure. Mandatory element means that in any case the element must appear in the code. An optional element means that the element appears in the code in a specific application. A mandatory element validTime (valid time) and an inter-prediction (time slice type description) in a physical time slice (FeatureTimeSlice); the optional elements sequence number (serial number), correction number (correction number), timelicementata (time slice metadata), featurelife (entity life), featuretype group (entity feature group), extension (extension). Wherein the specific application determines the selection of non-mandatory elements, i.e. all elements among the physical time slices are selected according to the specific application situation, except mandatory elements. For example, an extension element is a non-mandatory element. AIXM5.1.1 discloses that the feature set (not all) of the aviation entity, in the actual application process, the attribute of the entity is not present in AIXM5.1.1, and the optional element extension is present in the code and includes the attribute of the entity that is required to be used. The correction number is an optional element. When the sent aviation entity information is correct (no modification is needed), the correction number does not appear; if the sent Hangzhou red entity information is wrong or changes, an optional element correctionNumber appears in the code.
The FeaturePropertyGroup in AIXM encapsulates all the attributes of the aviation element, for the attribute set of the runway direction entity where miniscules define the element to appear a minimum number of times, the miniscules of all the elements in the attribute set of the runway direction entity have a value of 0, i.e., all the elements are optionally coded, and when modeling the native aviation element, the element attributes can be selected according to the definition of the element required by the local aviation-related regulations.
2. Extensibility of entity properties:
in the entity to AIXM mapping rule, an "Abstract FeatureExtension" element is defined, which acts as an extension for the entity. When the element under study is not on the AICM graph published by ICAO, the element can be expanded into the entity of the existing element according to the relation between aviation elements, and finally the element is used as the Abstract FeatureExtent part of the existing entity to be encoded, and when the native aviation element is not defined by AIXM, the AIXM encoding of the native aviation element can be realized by adopting a method of expanding the entity or object connected with the native aviation element. The entity extension rule of the Abstract FeatureExtension element is as follows: the complex data type of the abstract entity expansion is an abstract expansion class, the element is an abstract type, and the alternative group is an abstract expansion.
3. Extensibility of entity attribute data types:
in AIXM, complex data types define inheritance of the element to a basic data type unit. FIG. 2 is a complex data type of speed units inherited from a basic speed type, the speed units being selectable according to actual requirements; the unit defines the OTHER string, and when the required unit is not listed, the user can conveniently add the basic data type.
By analyzing the time slices and attribute groups of the entity, a part of aviation elements are found to be selectable, and by analyzing the Abstract FeatureExtent elements and the data basic type discovery in the AIXM, entity expansion can be carried out according to entity expansion rules. The selectivity of the elements in AIXM and the expansibility of the entity attributes in meeting AIXM coding rules prove that the AIXM-based aviation element coding can be localized.
Based on the analysis of the AIXM basic rules, it can be seen from the foregoing that localized modifications can be made from the elements, entity attributes and data types to accommodate the needs of the native aviation elements.
The coding rule in the invention is based on the following principle:
1) The integrity of the data must be ensured. Each value in the source database must exist in the target XML instance, which is critical to prevent data loss.
2) The newly created target XML instance (attribute value pair) must be correct. Each attribute value in the source database must be the same as in XML, which is necessary to prevent data corruption.
3) The value must be placed in the correct position within the XML structure. The structural integrity of XML schema testing is critical to ensure that values in the source database have been placed in the expected nesting locations.
Example 5: the entity is AIXM localization encoding at stop lane:
stop Way (SWY) refers to a rectangular area delimited symmetrically to the central extension of the runway on the ground immediately beyond the end of the runway. When the aircraft breaks off for reasons, the aircraft is used. The standard AICM library is queried, no AICM pattern is defined for the entity, the positions and the effects of stopping lanes are considered to be closely related to the runway, no runway exists, and no stopping lane has any meaning for the running of the airplane. Runway information is published in products of aviation information class in China, for example, NAIP. It will therefore be considered to mark the stop track information within the track element, choosing its main information length, width and code as attributes of the SWY, both length and width belonging to the length unit. AIXM encoding by SWY entity As shown in FIG. 3, abstract RunwayExtension using runway elements defines stop track information.
Claims (6)
1. The method is characterized in that based on the unchanged original AIXM data structure, the entity, the attribute and the data type of the AIXM are deleted, modified and redefined according to the type and the attribute of the native aviation entity, so as to realize the native encoding of the AIXM data structure;
according to the type and attribute of the native aviation entity, deleting, modifying and redefining the entity, attribute and data type of the AIXM coding, the method for realizing the native coding of the AIXM data comprises the following specific steps:
s1, determining a native aviation entity and judging whether the native aviation entity exists in a standard AICM;
if yes, enter step S2;
if not, entering step S6;
s2, judging the relation between the attribute of the native aviation entity and the entity attribute in the standard AICM;
if the attributes are consistent, the step S3 is carried out;
if the attribute of the native aviation entity is more than the entity attribute published in the standard AICM, entering step S4;
if the attribute of the native aviation entity is less than the entity attribute published in the standard AICM, entering step S5;
s3, judging whether the basic data types of the attribute of the native aviation entity exist in the standard AICM;
if yes, go to step S8;
if not, entering step S7;
s4, adding attribute codes of the attribute parts of the local aviation entity with more than the entity attributes in the standard AICM into Abstract Feature Extent elements of the local aviation entity AIXM, and entering step S3;
s5, reserving entity attributes which are the same as the attribute of the native aviation entity in the standard AICM, deleting entity attributes in the standard AICM which are more than the attribute of the native aviation entity, and entering step S3;
s6, searching an entity related to the native aviation entity, adding the integral attribute code of the entity into Abstract Feature Extent elements of the native aviation entity AIXM, and entering a step S3;
s7, adding data corresponding to the data types of the local aviation entities, which are more than the data types in the standard AICM, to the standard AICM, and entering step S8;
s8, based on the current local aviation entity AIXM and the local aviation entity information stored in the standard AICM, AIXM coding of the local aviation entity is carried out, and the localization coding of the AIXM data structure is achieved.
2. The localization encoding method of the AIXM data structure of claim 1, wherein the Abstract Feature Extent element is an element for entity extension in an entity-to-AIXM mapping rule.
3. The localization encoding method of the AIXM data structure of claim 2, wherein the basic data type in step S3 comprises a length unit and a speed data.
4. The method according to claim 3, wherein in step S6, the entity related to the native aviation entity is found in the native aviation specification and in actual operation.
5. A localization encoding apparatus of an AIXM data structure, comprising:
the entity comparison module is used for comparing the native aviation entity with the entity stored in the standard AICM and modifying the native aviation entity AIXM according to the comparison result;
the entity attribute comparison module is used for comparing the attribute of the native aviation entity with the entity attribute stored in the standard AICM and modifying the entity attribute stored in the AIXM or the standard AICM corresponding to the native aviation entity according to the comparison result;
the entity data type comparison module is used for comparing the data type of the attribute of the local entity with the entity attribute data type stored in the standard AICM, and modifying the data type stored in the standard AICM for the AIXM coding of the local aviation entity according to the comparison result;
the local aviation entity AIXM coding module is used for carrying out AIXM coding according to the current local aviation entity AIXM and the local aviation entity information stored in the standard AICM, so as to realize the localization coding of the AIXM data structure;
in the entity comparison module, the method for modifying the local aviation entity AIXM according to the comparison result comprises the following steps: searching for an entity related to the native aviation entity when the native aviation entity does not exist in the standard AICM, and adding the integral attribute code of the entity to Abstract Feature Extent elements of the native aviation entity AIXM;
in the entity attribute comparison module, the method for modifying AIXM corresponding to the native aviation entity according to the comparison result comprises the following steps: when the attribute of the local aviation entity is more than the entity attribute published in the standard AICM, adding an attribute code of a local aviation entity attribute part which is more than the entity attribute in the standard AICM into a Abstract Feature Extent element of the local aviation entity AIXM;
the method for modifying the entity attribute stored by the standard AICM according to the comparison result comprises the following steps: when the attribute of the native aviation entity is less than the entity attribute published in the standard AICM, the entity attribute which is the same as the attribute of the native aviation entity is reserved in the standard AICM, and the entity attribute in the standard AICM which is more than the attribute of the native aviation entity is deleted;
in the entity data type comparison module, the method for modifying the data type stored in the standard AICM for the AIXM coding of the local aviation entity according to the comparison result comprises the following steps: when the basic data types of the attribute of the local aviation entity are more than those in the standard AICM, adding the data corresponding to the data types of the local aviation entity which are more than those in the standard AICM into the standard AICM.
6. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program, the computer program executable instructions for causing a computer to perform the method according to any one of claims 1-4.
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