CN107016069A - Towards the metadata interchange system of intelligent transportation - Google Patents

Towards the metadata interchange system of intelligent transportation Download PDF

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CN107016069A
CN107016069A CN201710172878.7A CN201710172878A CN107016069A CN 107016069 A CN107016069 A CN 107016069A CN 201710172878 A CN201710172878 A CN 201710172878A CN 107016069 A CN107016069 A CN 107016069A
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metadata
service
gateway
management
directory
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戚湧
李千目
熊亭
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Nanjing University of Science and Technology
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Nanjing University of Science and Technology
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/22Indexing; Data structures therefor; Storage structures
    • G06F16/2228Indexing structures
    • G06F16/2246Trees, e.g. B+trees
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/22Indexing; Data structures therefor; Storage structures
    • G06F16/2282Tablespace storage structures; Management thereof
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/24Querying
    • G06F16/245Query processing
    • G06F16/2457Query processing with adaptation to user needs
    • G06F16/24573Query processing with adaptation to user needs using data annotations, e.g. user-defined metadata
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/25Integrating or interfacing systems involving database management systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/04Network management architectures or arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/01Protocols
    • H04L67/10Protocols in which an application is distributed across nodes in the network
    • H04L67/1001Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
    • H04L67/1004Server selection for load balancing

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  • General Physics & Mathematics (AREA)
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  • Library & Information Science (AREA)
  • Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
  • Computer And Data Communications (AREA)

Abstract

The invention discloses a kind of metadata interchange system towards intelligent transportation.The system can be deployed to chip level and regional level center, and form a distributed shared exchange network, specifically include:Metadata and directory management subsystem, the interface of metadatabase is provided, metadata acquisition that shared service system is related to is completed, issues, exchange and uses, and the catalogue using metadata as core is inquired about and management service, is realized that unified data directory is accessed and service;Metadata synchronization subsystem, comprising metadata interchange module and metadata gateway registration module, realizes the maintenance to the metadata interchange of each Centroid, is also responsible for the discovery and registration of center metadata gateways at different levels and directory service.The system can improve the efficiency and resource utilization of Data Collection on the basis of the functions such as metasearch, directory service, access interface, management by synchronization are realized, also, reduce error probability, it is ensured that load balancing.

Description

Towards the metadata interchange system of intelligent transportation
Technical field
The present invention relates to Data Interchange Technology field, specially a kind of metadata interchange system towards intelligent transportation.
Background technology
With the continuous input of Transportation Infrastructure Construction and stepping up for living standards of the people, means of transportation scale and Quantity is just risen with surprising rapidity, and traffic congestion, traffic accident takes place frequently, and huge challenge is brought to traffic administration.Region and complete Ball bound traffic detection data, region class business service information data volume it is huge, the collecting function of regional center Various types of data Very high requirement should be reached;And system should embody preferable reliability, the load average for allowing all hardware to bear is occurred without Local excessive load or the situation for the load that kicks the beam, and can easily operate distributed data collection and with very strong versatility and Autgmentability.
But, existing data exchange system does not have comprehensively design for field of traffic and studied, and there are data The efficiency and resource utilization of collection are relatively low, the problem of error probability is big.
The content of the invention
It is an object of the invention to provide a kind of metadata interchange system towards intelligent transportation, to improve Data Collection Efficiency and resource utilization, reduce error probability, it is ensured that load balancing.
The technical solution for realizing the object of the invention is:
A kind of metadata interchange system towards intelligent transportation, including metadata and directory management subsystem, metadata it is same Subsystem, wherein:
The metadata and the basis that directory management subsystem is shared service system, complete what shared service system was related to Metadata acquisition, issue, exchange and use, and the catalogue using metadata as core is inquired about and management service, realize system One data directory accesses service;Metadata has two-layer configuration with directory management subsystem, and chip level Centroid is shared clothes Business metadata unifies entrance and administrative center there is provided the issuing service of the whole network metadata and manages each region class node;Region fraction Node is manager in this province traffic metadata set, the unified metadata of publishing center node, and provides own to this province user Metadata issuing service;
The metadata synchronization subsystem, realizes the maintenance to the metadata interchange of each Centroid, safeguard chip level and Exchange between the metadata system of regional level Centroid, realize that the whole network of metadata is synchronous;Metadata is synchronous simultaneously Subsystem is also responsible for the discovery and registration of center metadata gateways at different levels and directory service.
Further, the metadata includes metadata acquisition issue, metadata catalog management with directory management subsystem Three modules are safeguarded with service, metadata, wherein:
The metadata acquisition release module, is responsible for standardization and the generation meta data file formatted;In chip level and area Yu Ji centers it is local, metadata acquisition release module according to apply metadata template and predefined collection rule, pass through people Work and automatic two ways generate the meta data file of locally applied metadata;
The metadata catalog management and service module, are responsible for the attended operation that metadata catalog is created, updates, deleted, Metadata catalog tree is set up based on data classification cataloging code, the tissue of each directory entry is completed, records, be the management of metadata A bibliographic structure defined is provided with access;Realize what data found and navigated by accessing the directory tree of metadatabase Function, metadata catalog management and the basic platform that service module is data sharing, the metadata mesh of standard is provided to client Record retrieval service;
The metadata maintenance module, for realizing importing and exporting for metadata, the member that specification will be met and pass through examination & verification Data are imported into the metadatabase specified, and the metadata record in metadatabase is exported into XML file;It is various for supporting Metadata standard, and realization is from XML format text to RDBMS relation tables, the mutual conversion of level catalog data base;Realize The database configuration management of metadata, maintenance off-line function.
Further, the metadata and the system architecture of directory management subsystem include metadata gateway, metadata and taken Business device and metadatabase, wherein:
The metadata gateway is the central hub for supporting Metadata Service, with server agent, server registration pipe Reason, the function of network client management;
The meta data server is used to issue metadata, and each meta data server is on the one hand by applying for the registration of, this Node metadata information is brought into whole system;On the other hand receive Web server again to refer to the metasearch of this node Order, user passes through the metadata and data message in the subsystem transparent access any node;
The metadatabase is the core content of metadata information management system, and various metadata informations are according to unified member Data standard is handled, and is uploaded to using Editor or automated manner in metadatabase.
Further, the metadata synchronization subsystem includes metadata interchange module and metadata gateway registration module, Wherein:
The metadata interchange module, it is real by the exchange between the metadata system of chip level and region class Centroid The whole network of existing metadata is synchronous;
The metadata gateway registration module, is responsible for being managed directory service and gateway, realizes service registry, service Issue, service discovery, are completed to metadata catalog service and the distributed management of gateway service.
Further, between metadata system of the metadata interchange module by chip level and region class Centroid Exchange, realize that the whole network of metadata is synchronous, wherein the switch mode between the metadata system of chip level and region class Centroid Including pull mode and push mode:
When in pull mode, the metadata gateway of chip level Centroid is initiated to the metadata gateway at region class center Data harvesting request, the metadata catalog that region class Centroid gateway extracts renewal from local metadata catalog storehouse is issued Chip level center metadata gateway, chip level center receives these directory entries, compiles deposit chip level center metadata catalogue;Work as area Domain level Centroid metadata gateway to chip level Centroid metadata gateway initiate Metadata Harvesting request when, chip level centromere The metadata catalog that point gateway extracts renewal from local metadata catalog is sent to region class center metadata gateway, region Level Centroid metadata gateway is deposited into local metadata catalog after obtaining above-mentioned directory entry;
When in push mode, when local meta data file has renewal, region class Centroid is by the metadata of renewal File pushes to local metadata gateway in form of a message, and gateway is stored in local metadata catalog after being verified to message, Message is pushed to the metadata gateway of all adjacent nodes simultaneously, by that analogy, until all nodes receive push Metadata updates message, and it is stored in local metadata catalog.
Compared with prior art, its remarkable advantage is the present invention:(1) the system realize metasearch, directory service, On the basis of the functions such as access interface, management by synchronization, the efficiency and resource utilization of Data Collection can be also improved, error is reduced Probability, it is ensured that load balancing;(2) the reasonably distribution load, and higher retractility and money can be provided between multiple stage computers Source utilization rate, supports the metadata acquisition of polytype metadata standard, realizes that metasearch, directory service, access connect The functions such as mouth, management by synchronization.
Brief description of the drawings
Fig. 1 is metadata interchange system layout topological diagram of the invention.
Fig. 2 constitutes structure chart for the metadata interchange system of the present invention.
Fig. 3 is metadata of the invention and directory management subsystem function module placement figure.
Fig. 4 is metadata acquisition release module flow chart of the invention.
Fig. 5 is metadata catalog service system structure figure of the invention.
Fig. 6 is metadata of the invention and directory management subsystem structure figure.
Fig. 7 is metadata synchronization subsystem functional module layout of the invention.
Fig. 8 is metadata interchange of the invention with cutting flow chart.
Embodiment
For a better understanding of the present invention, present disclosure is described further below in conjunction with the accompanying drawings.
Metadata interchange system of the invention towards intelligent transportation, in intelligent transportation big data platform framework process of construction In, it is managed collectively using metadata.Metadata, be to information resources standardization description, it be according to certain standard, from Corresponding feature, a characteristic element set of composition are extracted in information resources.The system is to realize that information unification is managed, altogether The basis of tactical management is enjoyed, it will be deployed to chip level and regional center, form a distributed shared exchange network, and Use the starburst topology structure using chip level center as core.
Metadata interchange system of the invention towards intelligent transportation, including metadata and directory management subsystem, metadata Synchronization subsystem, wherein:
The metadata and the basis that directory management subsystem is shared service system, complete what shared service system was related to Metadata acquisition, issue, exchange and use, and the catalogue using metadata as core is inquired about and management service, realize system One data directory accesses service;Metadata has two-layer configuration with directory management subsystem, and chip level Centroid is shared clothes Business metadata unifies entrance and administrative center there is provided the issuing service of the whole network metadata and manages each region class node;Region fraction Node is manager in this province traffic metadata set, the unified metadata of publishing center node, and provides own to this province user Metadata issuing service;
The metadata synchronization subsystem, realizes the maintenance to the metadata interchange of each Centroid, safeguard chip level and Exchange between the metadata system of regional level Centroid, realize that the whole network of metadata is synchronous;Metadata is synchronous simultaneously Subsystem is also responsible for the discovery and registration of center metadata gateways at different levels and directory service.
Further, the metadata includes metadata acquisition issue, metadata catalog management with directory management subsystem Three modules are safeguarded with service, metadata, wherein:
The metadata acquisition release module, is responsible for standardization and the generation meta data file formatted;In chip level and area Yu Ji centers it is local, metadata acquisition release module according to apply metadata template and predefined collection rule, pass through people Work and automatic two ways generate the meta data file of locally applied metadata;
The metadata catalog management and service module, are responsible for the attended operation that metadata catalog is created, updates, deleted, Metadata catalog tree is set up based on data classification cataloging code, the tissue of each directory entry is completed, records, be the management of metadata A bibliographic structure defined is provided with access;Realize what data found and navigated by accessing the directory tree of metadatabase Function, metadata catalog management and the basic platform that service module is data sharing, the metadata mesh of standard is provided to client Record retrieval service;
The metadata maintenance module, for realizing importing and exporting for metadata, the member that specification will be met and pass through examination & verification Data are imported into the metadatabase specified, and the metadata record in metadatabase is exported into XML file;It is various for supporting Metadata standard, and realization is from XML format text to RDBMS relation tables, the mutual conversion of level catalog data base;Realize The database configuration management of metadata, maintenance off-line function.
Further, the metadata and the system architecture of directory management subsystem include metadata gateway, metadata and taken Business device and metadatabase, wherein:
The metadata gateway is the central hub for supporting Metadata Service, with server agent, server registration pipe Reason, the function of network client management;
The meta data server is used to issue metadata, and each meta data server is on the one hand by applying for the registration of, this Node metadata information is brought into whole system;On the other hand receive Web server again to refer to the metasearch of this node Order, user passes through the metadata and data message in the subsystem transparent access any node;
The metadatabase is the core content of metadata information management system, and various metadata informations are according to unified member Data standard is handled, and is uploaded to using Editor or automated manner in metadatabase.
Further, the metadata synchronization subsystem includes metadata interchange module and metadata gateway registration module, Wherein:
The metadata interchange module, it is real by the exchange between the metadata system of chip level and region class Centroid The whole network of existing metadata is synchronous;
The metadata gateway registration module, is responsible for being managed directory service and gateway, realizes service registry, service Issue, service discovery, are completed to metadata catalog service and the distributed management of gateway service.
Further, between metadata system of the metadata interchange module by chip level and region class Centroid Exchange, realize that the whole network of metadata is synchronous, wherein the switch mode between the metadata system of chip level and region class Centroid Including pull mode and push mode:
When in pull mode, the metadata gateway of chip level Centroid is initiated to the metadata gateway at region class center Data harvesting request, the metadata catalog that region class Centroid gateway extracts renewal from local metadata catalog storehouse is issued Chip level center metadata gateway, chip level center receives these directory entries, compiles deposit chip level center metadata catalogue;Work as area Domain level Centroid metadata gateway to chip level Centroid metadata gateway initiate Metadata Harvesting request when, chip level centromere The metadata catalog that point gateway extracts renewal from local metadata catalog is sent to region class center metadata gateway, region Level Centroid metadata gateway is deposited into local metadata catalog after obtaining above-mentioned directory entry;
When in push mode, when local meta data file has renewal, region class Centroid is by the metadata of renewal File pushes to local metadata gateway in form of a message, and gateway is stored in local metadata catalog after being verified to message, Message is pushed to the metadata gateway of all adjacent nodes simultaneously, by that analogy, until all nodes receive push Metadata updates message, and it is stored in local metadata catalog.
Embodiment 1
With reference to Fig. 1, in intelligent transportation big data platform framework process of construction, it is managed collectively using metadata.This System is to realize information unification management, the basis of sharing policy management, and it will be deployed to chip level and regional center, form one Individual distributed shared exchange network, and use the starburst topology structure using chip level center as core.Chip level center can mainly be received Collect the traffic data of section level transmission and the benefit adjusting data of regional center transmission and lack report and notify that these data are by with message Form is sent to chip level center, then by encapsulation, the operation such as processing, according to priority order deposit chip level central database.Piece , it is necessary to which the rule in rule base is first checked, solved when level centre data will be sent to other users or regional center The data prediction operation such as pressure and processing, then rule-based transmission is realized by message queue and corresponding scheduling mechanism.
With reference to shown in Fig. 2, one embodiment of the present of invention is the metadata interchange system towards intelligent transportation, and described is System is made up of two parts:Metadata and directory management subsystem and metadata synchronization subsystem.Metadata and directory management subsystem The main interface for providing metadatabase of system, is the basis of shared service system, main to complete first number that shared service system is related to According to gathering, issue, exchange and use, and the catalogue using metadata as core is inquired about and management service, realized unified Data directory accesses service.It is all deployed with centers at different levels metadatabase, metadata acquisition issue, metadata catalog management with The module such as directory service and metadata maintenance.It has two-layer configuration, and chip level Centroid is unified for shared service metadata Entrance and administrative center is there is provided the issuing service of the whole network metadata and manages each region class node;Region class partial node is that this province hands over Manager in logical metadata set, not only can also provide own with the unified metadata of publishing center node to this province user Metadata issuing service.It is issued by metadata acquisition, the mould such as the directory management of metadata and directory service, metadata are safeguarded Block is constituted.
Metadata synchronization subsystem includes metadata interchange module and metadata gateway registration module.It is mainly realized to each Between the metadata system of the maintenance of the metadata interchange of individual Centroid, predominantly chip level and regional level Centroid The whole network for exchanging, realizing metadata is synchronous;Metadata synchronization subsystem is also responsible for center metadata gateways at different levels and mesh simultaneously Record the discovery and registration of service.
With reference to shown in Fig. 3, metadata and directory management subsystem are issued by metadata acquisition, the directory management of metadata with The module compositions such as directory service, metadata maintenance.The generation member that the collection release module of metadata is responsible for standardizing and formatted Data file.In the local of chip level and region class center, metadata acquisition and release module are according to application metadata template and pre- The collection rule of definition, the meta data file of locally applied metadata, these yuan of number are generated by artificial and automatic two ways Taken out according to description section therein from the metadatabase of data storage management system, and the part manually gathered has to pass through Verify and audit to issue;Local metadata gateway provides the application metadata text of service acquisition locally via local metadata Part, and by conversion and the local metadatabase of deposit is arranged, finally carry out metadata catalog issue.Its broad flow diagram such as Fig. 4 It is shown.
The attended operations such as the establishment, renewal, deletion of metadata catalog are responsible in the directory management of metadata, and it is based on data point Class cataloging code sets up metadata catalog tree, completes the tissue of each directory entry, records, and the management and access for metadata are provided One defines good bibliographic structure;Metadata catalog service realized by accessing the directory tree of metadatabase data find and The function of navigation, the metadata catalog retrieval service of standard is provided to client.Directory service module is indexed according to resource classification Require that the metadata for meeting feature is integrated into corresponding mesh by the record in automatic screening metadatabase with directory entry format In record, metadata catalog is formed.When the taxonomic hierarchies of resource changes, NetWare directory services NetWare will adjust bibliographic structure.When When resource entries information needs to change and updated, NetWare directory services NetWare supports keeper to realize that these are operated by backstage.Work as member When metadata in database is deleted, the corresponding information in directory tree should be also deleted, with the uniformity of maintenance system.Member Data directory service system structure is as shown in Figure 5.
Metadata maintenance module is used for realizing importing and exporting for metadata, the metadata that will such as meet specification and pass through examination & verification It imported into the metadatabase specified, the metadata record in metadatabase is exported into XML file;It can also be used to support Various metadata standards, and from XML format text to RDBMS relation tables, the mutual conversion of level catalog data base;And Realize the database configuration management of metadata, the function such as maintenance off-line.
Metadata is mainly by mainly by metadata gateway, Metadata Service with directory management subsystem with reference to shown in Fig. 6 Device and metadatabase composition.Metadata gateway is the central hub for supporting Metadata Service, is noted with server agent, server The functions such as volume management, network client management.Meta data server is used to issue metadata (metadata catalog), each Metadata Service On the one hand device by applying for the registration of, is brought this node metadata information in whole system into, on the other hand receives Web service again Device is instructed to the metasearch of this node, and such user just can be with first number in transparent access any node by the subsystem According to and data message.Metadatabase is the core content of metadata information management system, and various metadata informations are according to unification Metadata standard is handled, and is uploaded to using Editor or other automated manners in metadatabase.
With reference to shown in Fig. 7, metadata synchronization subsystem includes metadata interchange module and metadata gateway registration module.Member Exchange (pull, push) between the metadata system that data exchange module passes through chip level and region class Centroid, realizes member The whole network of data is synchronous.Pull mode provides the metadata synchronous service of general transit information, ageing general;And push mode It is then real-time transit information, such as traffic, weather warning provide ageing stronger metadata synchronous service.
When under pull mode, the metadata gateway of chip level Centroid is sent out to the metadata gateway at region class center Data harvesting request is played, region class Centroid gateway extracts the metadata catalog hair of renewal from local metadata catalog storehouse Chip level center metadata gateway is given, chip level center receives these directory entries, compile deposit chip level center metadata catalogue;When Region class Centroid metadata gateway to chip level Centroid metadata gateway initiate Metadata Harvesting request when, chip level center The metadata catalog that node gateway extracts renewal from local metadata catalog is sent to region class center metadata gateway, area Domain level Centroid metadata gateway is deposited into local metadata catalog after obtaining above-mentioned directory entry.
When in push mode, when local meta data file has renewal, region class Centroid is by the metadata of renewal File pushes to local metadata gateway in form of a message, and gateway is stored in local metadata catalog after being verified to message, Message is pushed to the metadata gateway of all adjacent nodes simultaneously, by that analogy, until all nodes receive push Metadata updates message, and it is stored in local metadata catalog.Fig. 8 illustrates metadata interchange with cutting flow.
The metadata gateway registration module is responsible for being managed directory service and gateway, realizes service registry, service Issue, service discovery.Complete to metadata catalog service and the distributed management of gateway service.

Claims (5)

1. a kind of metadata interchange system towards intelligent transportation, it is characterised in that including metadata and directory management subsystem, Metadata synchronization subsystem, wherein:
The metadata and the basis that directory management subsystem is shared service system, complete first number that shared service system is related to According to gathering, issue, exchange and use, and the catalogue using metadata as core is inquired about and management service, realized unified Data directory accesses service;Metadata has two-layer configuration with directory management subsystem, and chip level Centroid is shared service member Data unify entrance and administrative center there is provided the issuing service of the whole network metadata and manage each region class node;Region class partial node It is manager in this province traffic metadata set, the unified metadata of publishing center node, and provide own first number to this province user According to issuing service;
The metadata synchronization subsystem, realizes the maintenance to the metadata interchange of each Centroid, safeguards chip level and each Exchange between the metadata system of region class Centroid, realize that the whole network of metadata is synchronous;The subsystem of metadata synchronization simultaneously System is also responsible for the discovery and registration of center metadata gateways at different levels and directory service.
2. the metadata interchange system according to claim 1 towards intelligent transportation, it is characterised in that the metadata with Directory management subsystem includes metadata acquisition issue, metadata catalog management and service, metadata and safeguards three modules, its In:
The metadata acquisition release module, is responsible for standardization and the generation meta data file formatted;In chip level and region class Center it is local, metadata acquisition release module according to applying metadata template and predefined collection rule, by artificial and Automatic two ways generates the meta data file of locally applied metadata;
The metadata catalog management and service module, are responsible for the attended operation that metadata catalog is created, updates, deleted, are based on Data classification cataloging code sets up metadata catalog tree, completes the tissue of each directory entry, records, is the management of metadata and deposits Take and a bibliographic structure defined is provided;The work(that data find and navigated is realized by accessing the directory tree of metadatabase Can, metadata catalog management and the basic platform that service module is data sharing provide the metadata catalog of standard to client Retrieval service;
The metadata maintenance module, for realizing importing and exporting for metadata, the metadata that specification will be met and pass through examination & verification It imported into the metadatabase specified, the metadata record in metadatabase is exported into XML file;For supporting various first numbers According to standard, and realization is from XML format text to RDBMS relation tables, the mutual conversion of level catalog data base;Realize first number According to database configuration management, maintenance off-line function.
3. the metadata interchange system according to claim 1 towards intelligent transportation, it is characterised in that the metadata with The system architecture of directory management subsystem includes metadata gateway, meta data server and metadatabase, wherein:
The metadata gateway is the central hub for supporting Metadata Service, with server agent, server registration management, net The function of network customer account management;
The meta data server is used to issue metadata, and each meta data server is on the one hand by applying for the registration of, this node Metadata information is brought into whole system;On the other hand receive Web server again to instruct the metasearch of this node, use Family passes through the metadata and data message in the subsystem transparent access any node;
The metadatabase is the core content of metadata information management system, and various metadata informations are according to unified metadata Standard is handled, and is uploaded to using Editor or automated manner in metadatabase.
4. the metadata interchange system towards intelligent transportation according to claims 1, it is characterised in that the metadata Synchronization subsystem includes metadata interchange module and metadata gateway registration module, wherein:
The metadata interchange module, by the exchange between the metadata system of chip level and region class Centroid, realizes member The whole network of data is synchronous;
The metadata gateway registration module, is responsible for being managed directory service and gateway, realizes service registry, service hair Cloth, service discovery, are completed to metadata catalog service and the distributed management of gateway service.
5. the metadata interchange system towards intelligent transportation according to claims 4, it is characterised in that the metadata Exchange between the metadata system that Switching Module passes through chip level and region class Centroid, realizes that the whole network of metadata is synchronous, Switch mode wherein between the metadata system of chip level and region class Centroid includes pull mode and push mode:
When in pull mode, the metadata gateway of chip level Centroid initiates data to the metadata gateway at region class center Harvesting request, the metadata catalog that region class Centroid gateway extracts renewal from local metadata catalog storehouse issues chip level Center metadata gateway, chip level center receives these directory entries, compiles deposit chip level center metadata catalogue;Work as region class Centroid metadata gateway to chip level Centroid metadata gateway initiate Metadata Harvesting request when, chip level Centroid net The metadata catalog that renewal is extracted in pass from local metadata catalog is sent in region class center metadata gateway, region class Heart node metadata gateway is deposited into local metadata catalog after obtaining above-mentioned directory entry;
When in push mode, when local meta data file has renewal, region class Centroid is by the meta data file of renewal Local metadata gateway is pushed in form of a message, and gateway is stored in local metadata catalog after being verified to message, simultaneously Message is pushed to the metadata gateway of all adjacent nodes, by that analogy, until all nodes receive first number of push According to new information, and it is stored in local metadata catalog.
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CN109542895A (en) * 2018-10-25 2019-03-29 北京开普云信息科技有限公司 A kind of method for managing resource and system based on the customized extension of metadata
CN110069516A (en) * 2017-10-31 2019-07-30 中博信息技术研究院有限公司 A kind of service content intelligent management Implementation Technology based on normative document
CN111294231A (en) * 2018-12-07 2020-06-16 杭州海康威视系统技术有限公司 Resource management method and system
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