CN106933555A - A kind of data framework system - Google Patents
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Abstract
The present invention provides a kind of data framework system, including:Data storage layer, for providing data basic access interface, the organizational form of the storage of data and setting data on disk;Data access layer, loose coupling realizes the organizational form of data access, setting data in internal memory in the data storage layer, the interface for combining the data storage layer.Realize the Javascript API totally 54 for supporting the functions such as data retrieval, data access, data storage, data syn-chronization/shared and data recovery, the runtime environment of data framework is realized by Node-Webkit simultaneously, the mixing application and development based on Web technologies is supported, the obvious reduction of application and development difficulty and workload is thus brought.Only need to provide the user data management function under many equipment by doing data processing using front-end technology such as HTML, CSS, development difficulty is small compared with traditional file manager application, and can simultaneously operate on the platforms such as Linux, Android, save more than 50% code development workload.
Description
Technical field
The present invention relates to field of data storage, more particularly to a kind of data framework system.
Background technology
1.Git
Git is a free, the distributed version control system increased income, and any small or big project is efficiently processed for agility,
Can effectively, the treatment of high speed manages from very little to very big Item version.Git is Linus Torvalds to help manage
The Version Control software of the open source code that reason linux kernel is developed and developed.Torvalds take up exploitation Git be for
BitKeeper is substituted as a kind of transition scheme, is always what linux kernel developer used in the whole world before the latter
Main source code instrument.Some people in open source code community think that the licensing of BitKeeper is not appropriate for open source code community
Work, therefore Torvalds determine set about study the more flexible version control system of licensing.Although initial Git's opens
Hair is the process in order to aid in linux kernel to develop, we have found that also being used in a lot of other free software projects
Git.
Git is distributed version control system, and it does not have the concept of central server (although can be built in one in actual development
Central server), complete historical record is all preserved in each development machines, but it has local code warehouse and remote code storehouse
The concept in storehouse, and multiple remote warehouses can be followed the trail of.
Git can very fast set up branch and merge branch, and the ability with powerful tracking branch and hand-over branch.It is each
Individual project should all have a working directory (Working directory), can be oneself to build a catalogue, then this catalogue
The code of the inside Git manages (using git init orders and git add orders), it is also possible to by git clone orders from other
Place clone one project come to automatically generate a working directory.File in working directory is exactly when pre-editing and modification
File, if the catalogue that newly-established catalogue or new clone come, the file in working directory is exactly the newest shape of the project
State.Git be locally preserve all of historical record and branch record, these contents all in the .git catalogues of working directory,
Referred to as ware-house here (local repository).During old version when hand-over branch or before checking, the text in working directory
Part changes (this is only emphasis, and work need not switch catalogue, and the file in catalogue can automatically switch) automatically.Text in working directory
Part has three kinds of states:It has been changed that, kept in (stage), had been filed on.Amended file can first add staging area, once
Submitted to together after end-of-job.
Still code storage can be put on everybody server that can access in real work, do it is actual in it is genuinely convinced
Business device is used.After having worked on the local machine, warehouse is pushed on server using git push orders, changes a place
After changing a machine, it is only necessary to which git clone can once, again obtain all of code (comprising all of historical record and branch)
Work on.Server failure is also out of question, because preserving complete code storage on the machine of each work,
From without worrying that code is lost.Also it doesn't matter not to have network, can submit (git commit) in the same old way on the local machine, because
It is whole warehouse just on the machine of oneself, when there is network, push once just can be with.
Git has the concept of remote warehouse (remote repository), and can manage many remote warehouses, and remote warehouse can
To be server, or others' personal computer (but typically no people so uses), each remote warehouse has one
Brief name and an address, that remote warehouse alias for most starting clone codes are often defaulted as origin, oneself addition
Remote warehouse can arbitrarily specify alias, certain all of remote warehouse can arbitrarily change alias.Can be from remote warehouse
Obtain code (git fetch orders or git pull orders), it is also possible to which the code of oneself is pushed to remote warehouse, and (git push are ordered
Order is, it is necessary to write permission).
Git is also one in addition to the version control management for code development, in itself based on content addressed distributed field system
System, but there are a large amount of extra storage overheads as file system in itself in Git.
2.FUSE(Filesystem in Userspace)
User's space file system (Filesystem in Userspace, abbreviation FUSE) refers to the file realized in User space completely
System, current Linux is supported by kernel module to this, and some file system such as ZFS, glusterfs and luster use FUSE
Realize.
FUSE is a file system framework for user's space, and by FUSE, programmer can realize file system in User space,
And do not need the support of superuser.Including three modules:Kernel module, user's space storehouse and mount instruments.
As shown in figure 1, Fig. 1 is shown as the system framework schematic diagram of FUSE in the prior art.Kernel module realize one it is complete
The framework of whole file system, but concrete operations are not carried out (by programmer in user's space realization), and user's space storehouse is to programmer
DLL is provided, programmer by realize fuse_operations that FUSE is provided or fuse_ll_operations all or
File system is realized in part operation.
User data in current operation system is by file system organization and manages, with extensive, data-driven application
Explosive increase, and more and more Intelligent mobile equipments appearance, traditional file systemses management data mode in some aspects
Demand can not be met.First, traditional file systemses manage data in the way of file, and the management to data self-information is only wrapped
A small amount of information such as size, establishment/access time is included, cannot be from file system when being managed in application development, organizing data
The more valuable information of data are obtained, causes the data retrieval of complexity, access to be greatly limited.To one kind of this problem
Processing mode is that more more valuable information in data are given application program to manage, but causes data to be employed journey again simultaneously
Sequence package isolation, operating system and other application program can not obtain data and its information.On the other hand, traditional file systemses are not
Can treatment storage synchronization on different devices between user data with it is shared, the physical isolation problem of data needs also exist for applying journey
Sequence treatment.Finally, other module coupling degrees are high with operating system for current major part file system, depend on certain hardware device class
Type, and the interface for externally providing also is not quite similar, largely increased file system and cross-platform operation and applies journey in itself
The difficulty of the Cross-border congestion management of sequence.Accordingly, it would be desirable to a kind of new data organization and management framework meets application developer
Existing demand.
The content of the invention
The shortcoming of prior art, existing for solving it is an object of the invention to provide a kind of data framework system in view of the above
Traditional file systemses manage data in the way of file in having technology, and the management to data self-information only includes size, establishment/visit
Ask a small amount of information such as time, being managed in application development, tissue data when cannot obtain that data are more to be had from file system
The information of value, causes the data retrieval of complexity, access to be greatly limited;More more valuable information in data are handed over
Managed to application program, but cause data to be employed program package isolation again simultaneously, operating system and other application program can not
Obtain data and its information.Traditional file systemses can not process storage synchronization on different devices between user data with it is shared,
The physical isolation problem of data needs also exist for application program treatment;Other module coupling degrees of most of file system and operating system are high,
Certain hardware device type is depended on, and the interface for externally providing also is not quite similar, and largely increased file system sheet
The problem of the difficulty of the Cross-border congestion management of the cross-platform operation of body and application program.
In order to achieve the above objects and other related objects, the present invention provides a kind of data framework system, including:Data storage layer,
For providing data basic access interface, the organizational form of the storage of data and setting data on disk;Data access layer, pine
The data storage layer is coupled in, the interface for combining the data storage layer realizes data access, setting data in internal memory
Organizational form.
In one embodiment of the invention, the data storage layer includes user's space file system, for controlling to minimize data
The time of Version Control in operation, and ensure the uniformity of data in system components.
In one embodiment of the invention, the user's space file system includes:
Version control module, the version control function for realizing the data framework system;
File attribute expansion module, for basic document attribute extension to be formed the file attribute after extension.
In one embodiment of the invention, the file attribute after the extension includes music, document, contact person, video and picture.
In one embodiment of the invention, the user's space file system also includes:
Index module, for being indexed to file according to type and version after send to the file attribute expansion module.
In one embodiment of the invention, the data access layer includes system service module, for being carried in the form of system service
For data access service.
In one embodiment of the invention, the system service module includes:Service acquisition module, provides for superior equipment
Or obtain service;API module for reading and writing, data are directly accessed for the data framework system.
In one embodiment of the invention, the service acquisition module includes data sharing unit, data recovery unit, data inspection
Cable elements and data synchronisation unit.
In one embodiment of the invention, the API module for reading and writing includes:JavaScript API, for support based on JavaScript,
The web front end technological development application program of HTML, CSS, and the data access API of data framework system offer is provided;Text
Part system API, for directly reading and writing data by the data storage layer.
In one embodiment of the invention, the data access layer also includes RDF data storehouse, for data storage richness information.
As described above, a kind of data framework system of the invention, has the advantages that:
Realize for supporting the functions such as data retrieval, data access, data storage, data syn-chronization/shared and data recovery
Javascript API totally 54, while the runtime environment of data framework is realized by Node-Webkit, support to be based on Web skills
The mixing application and development of art, thus brings the obvious reduction of application and development difficulty and workload.Only need to use HTML, CSS
The user data management function under many equipment is provided by doing data processing etc. front-end technology, with traditional file manager application
It is small compared to development difficulty, and can operate in simultaneously on the platforms such as Linux, Android, the code for saving more than 50% is opened
Hair workload.
Brief description of the drawings
Fig. 1 is shown as the system framework schematic diagram of FUSE in the prior art.
Fig. 2 is shown as the systematic square frame schematic diagram of an embodiment of data framework system of the present invention.
Fig. 3 is shown as file attribute extension schematic diagram in data framework system of the present invention.
Specific embodiment
Embodiments of the present invention are illustrated below by way of specific instantiation, those skilled in the art can be as disclosed by this specification
Content understand other advantages of the invention and effect easily.The present invention can also add by way of a different and different embodiment
To implement or apply, the various details in this specification can also be based on different viewpoints and application, without departing from essence of the invention
Various modifications or alterations are carried out under god.It should be noted that, in the case where not conflicting, the feature in following examples and embodiment
Can be mutually combined.
It should be noted that the diagram provided in following examples only illustrates basic conception of the invention in a schematic way, scheme then
Component count, shape and size when only display is with relevant component in the present invention rather than according to actual implementation in formula are drawn, in fact
The kenel of each component, quantity and ratio can be a kind of random change when border is implemented, and its assembly layout kenel be likely to it is more multiple
It is miscellaneous.
Referring to Fig. 2 to Fig. 3.As shown in Fig. 2 Fig. 2 is shown as the systematic square frame of an embodiment of data framework system of the present invention
Schematic diagram.The present invention provides a kind of data framework system, including:Data storage layer, for provide data basic access interface,
The organizational form of the storage of data and setting data on disk;Data access layer, loose coupling is used in the data storage layer
The organizational form of data access, setting data in internal memory is realized with reference to the interface of the data storage layer.
Further, the data storage layer includes user's space file system, in the present embodiment, the user's space file system
System is developed in linux system based on Ext4 systems.Time for controlling Version Control in minimum data manipulation, and
Ensure the uniformity of data in system components.As shown in figure 3, Fig. 3 is shown as file attribute in data framework system of the present invention
Extension schematic diagram.The user's space file system includes:Version control module, the version for realizing the data framework system
This control function;File attribute expansion module, for basic document attribute extension to be formed the file attribute after extension.In this hair
In a bright preferred embodiment, the file attribute after the extension includes music, document, contact person, video and picture.In order to
Facilitating data access layer called data accumulation layer information, the user's space file system also includes:Index module, for basis
Type and version send to the file attribute expansion module after being indexed to file.
Further, the data access layer includes system service module, for providing data access clothes in the form of system service
Business.The system service module includes:Service acquisition module, provides or obtains service for superior equipment;API reads and writes mould
Block, data are directly accessed for the data framework system.In a preferred embodiment, the service acquisition module bag
Include data sharing unit, data recovery unit, data retrieval unit and data synchronisation unit.The API module for reading and writing includes:
JavaScript API, for supporting the web front end technological development application program based on JavaScript, HTML, CSS, and adjust
The data access API provided with data framework system;File system api, for directly reading and writing number by the data storage layer
According to.The data access layer also includes RDF data storehouse, for data storage richness information.
It is divided into two-layer in data framework design overall, from down to up respectively data storage layer and data access layer.Pine between two-layer
Coupling, lower floor provides data basic access interface, and efficient, abundant data access function is realized in upper strata using layer interface is stored.
Data storage layer is responsible for the storage of data, determines organizational form of the data on disk, it is necessary to the problem for solving includes metadata
Storage, data load storage, offer Edition Control Strategy, old version storage, data directory storage etc..Data access layer is born
Blame the access of data, determine organizational form of the data in internal memory, it is necessary to the problem for solving include data retrieval, data access,
Data syn-chronization, data sharing, data recovery etc., and provide universal data access API to application layer.
Data storage and access is all very high to space, time performance requirement, and data framework aims to provide more abundant, complicated work(
Energy.In design data storage layer is placed on to the maximum basic function of performance impact, the space time performance of storage is primarily upon,
Storage operation is realized using operating system Floor layer Technology;Complicated function is placed on data access layer, is mainly visited from developer's data
Ask that demand angle does data complex process, flexible and efficient exploitation is done in the part using front-end technology.Data storage and data access
Two-layer can respective independent operating, data storage layer can be directly compatible with the file operation of existing application, and data access layer can be transported
Row is on other file system.Data storage layer is based on Ext4 system development user's space file system in linux system,
On the one hand the time overhead that Version Control is brought in minimum data manipulation, is easier to ensure that number in system components on the other hand
According to uniformity.The function of extension mainly includes adding version control function, adds in the operate interface of user control file system
Enter the Version Control bottom function based on git, but the not function such as including data syn-chronization, and for music, video and other two enter
The solution of the systems such as big file references Git-annex is made to carry out Version Control;Also include extended file attributes informational function,
Data are accessed based on metadata query, the extended attribute provided using Ext4 file system is supported.Further, data access layer
Based on Node-webkit runtime environments, data access service is provided in the form of system service.Other application process has two kinds
Mode accesses data, and one is to obtain data retrieval, data syn-chronization, data sharing, data recovery by inter-process communication mechanisms
Service, another way is that the file system api for directly being provided by data storage layer reads and writes data (compatible non-HTML5 applications).
The function of support includes search function, and data retrieval can support that various complicated, hazy conditions are inquired about.According to data retrieval demand,
Using RDF canonical representation data;Additionally include multi-equipment environment data access, including data syn-chronization, data sharing and data
Recover function, the version control function that these functions are provided using the user control file system of data storage layer is real according to demand
The data access mode of existing Different Strategies.Further, data framework system provides unified JavaScriptAPI to upper strata, uses
To support based on web front end technological development application programs such as JavaScript, HTML, CSS, and call data framework system
The data access API of offer.Carry out doing application and development based on the data framework system, it is possible to use system-level multi-equipment environment
The function such as lower data syn-chronization, shared, data recovery, and do data retrieval, developer using the data specifying-information of various dimensions
Only need to consider mathematical logic treatment and regardless of data access problem.
Wherein, data storage layer concrete methods of realizing is as follows:
Data framework realizes four functions in many equipment aspects:Data retrieval, data syn-chronization, data sharing, data recovery.This
A little processes are needed to solve the problems, such as the data collision under many equipment automatically, and the problem is processed by Version Control.Data storage layer base
In FUSE and Libgit2 storehouses development of user space file system.
Version Control basic function is realized, according to FUSE framework general principles, custom file system accesses operate interface and adds Git
Bottom operation.Increase Object files and Ref files in file system, realize the foundation in subscriber data file git warehouses.
The automatic commit operations of the operations such as file access, read-write, metadata modification are realized in the file system interface of FUSE,
Realize preservation, modification and the union operation of branch.
For data syn-chronization, data sharing and data recovery function, accumulation layer basic function interface is called by data access layer real
It is existing.
Space performance of the optimization based on Git file system, the old version deleting mechanism of flexible design, metadata storage in ext4
In file structure, stored rather than in unique file mode
Time performance of the optimization based on Git file system, for Git with the memory mechanism that content is index, seeks efficient number
According to indexing means, upper strata inquiry data speed is improved.
The storage mode of Git back plan files is changed, is directly changed using RDF data storehouse Levelgragh in data storage layer
Git rear ends store, and so can all have significantly performance boost with omitted data library component, space or time on upper strata.
Data storage layer provides multiple API as a user control file system to upper strata.Its API includes two parts,
A part is the standard interface that FUSE is provided, and standard interface being capable of compatible other file system interfaces.By changing standard interface
Realization, the function such as Version Control is completed, so for existing application program, it is not necessary to change the i.e. compatible number of code
According to accumulation layer file system.Part II is the distinctive interface of data storage layer file system, there is provided the function outside standard interface,
Such as synchronous, it is peculiar that application program or system program based on the exploitation of data storage layer file system can directly invoke this document system
API functions.
Data access layer concrete methods of realizing is as follows:
In data access layer, the present invention is included using RDF data storehouse Levelgragh data storages, the main data types being related to
Music, document, contact person, video, picture.Current these data types can substantially meet demand used in everyday, but
If designed only around this few major class data design will be caused not possess sustainable developability.At the same time, it is desirable to data type energy
With more scalability.Therefore, it is fixed in processing data type, it is contemplated that some general character of all resources are extracted
One type on basis of justice and the attribute on basis.On this basis, any specific data type can regard type of foundation as
Extension.It is base attributes by the attribute definition common to these data types, the attribute of every kind of data type is all based on base
The extension of attribute.Its relation is as shown in Figure 2.So design makes data represent with more readability, also allows for managing and safeguards,
The addition and deletion of data type can be more prone to.After the definition of data type is separated with data manipulation, this point was being developed
It is reflected more clearly in journey.So design can also flexibly realize Extended-type.Increase new data type if desired,
Only vocabulary need to be described the data that type inherits RDF, then the distinctive descriptor of respective extension type.Specific extension class
The visible following form of type.
The attribute of foundation class is as shown in table 1:
The basic generic attribute of table 1
Attribute | Type | Description |
URI | string | The unique mark of data |
createTime | date | The creation time of data |
lastModifyTime | date | The data Last modification time |
lastAccessTime | date | Data last time access time |
createDev | string | Create the device number of data |
lastModifyDev | string | The device number of Last modification data |
lastAccessDev | string | Last time accesses the device number of data |
filename | string | Filename |
postfix | string | File suffixes name |
category | string | Data type name |
size | integer | Size of data |
path | string | Data path |
tags | string | Data label |
The attribute as shown in table 2 of music type
The music type extended attribute of table 2
Attribute | Type | Description |
bit_rate | string | The bit rate of audio file |
frequency | Integer | The frequency of audio file |
track | string | The track name of audio file |
TDRC | string | Data last time access time |
APIC | string | The front cover data of music file |
TALB | string | Album name |
TPE1 | string | The singer of music |
TXXX | string | The author of music |
TIT2 | string | The title of music |
COMM | string | The label title of music |
The attribute as shown in table 3 of Doctype
The Doctype extended attribute of table 3
Attribute | Type | Description |
project | string | The affiliated project name of document |
The attribute as shown in table 4 of video type
The video type extended attribute of table 4
Attribute | Type | Description |
format_long_name | string | Video file format name |
width | Integer | Video pictures width |
height | Integer | Video pictures are highly |
display_aspect_ratio | string | Video pictures ratio |
pix_fmt | string | Pixel size |
duration | string | Video length |
major_brand | string | Decoder title |
minor_version | string | Decoder version |
compatible_brands | string | Decoder label |
The attribute as shown in table 5 of picture/mb-type
The picture/mb-type extended attribute of table 5
Attribute | Type | Description |
location | string | Video file format name |
The attribute as shown in table 6 of Doctype
The contact type extended attribute of table 6
Attribute | Type | Description |
lastname | string | Video file format name |
firstname | Integer | Video pictures width |
Integer | Video pictures are highly | |
pnone | string | Video pictures ratio |
Data access layer is based on RDF for developer provides data access function, and the exploitation of data access layer is based on data storage layer
The API for being provided carries out bottom data and calls.The Web language API that developer directly invokes data access layer offer is applied
Exploitation, and the realization of data storage layer need not be concerned about.Data storage layer is designed realization based on Libgit2 storehouses, its data
Information is stored in the form of blob, therefore when data access layer calls newly-built or modification is related API, it is necessary to adjust
Data storage layer interface is used, corresponding data is write to file system, i.e., stored in corresponding Blob with it to bottom and write data.
The read-write of data storage layer data is all carried out by object of Blob.Data storage layer provides the API of generation URI, to data
Access layer is called.In newdata, data storage layer generates the URI of unique identification data, then data access layer passes through URI
Carry out data access.File system in the present invention only obtains data without path concepts by the URI of unique mark.Pass through
After data access layer changes metadata or data, the corresponding data of data storage layer are also required to be changed, and should be according to data
Latest edition update data storage.
In sum, it is divided into data storage layer and data access layer by the management of data, and respectively in solution data storage layer
Data store organisation, data storage method, old version storage, data information memory the problems such as, and in data access layer
Data message representation, the interface problem between data access and two-layer, data framework system are provided for application developer
Under multi-equipment environment, complete user data tissue rwan management solution RWAN.
In the present invention, data storage layer is responsible for the storage control of data, completes data syn-chronization, recovers and sharing functionality, including
The realization of versions of data control, and the user's space file system for introducing version control function exploitation;Data access layer, is responsible for
Access to data is controlled, and the rich information to data is stored, and the interface of data storage layer is called downwards to the number of storage
The operation such as change according to additions and deletions are carried out, upwards for developer provides development interface, developer is fast developed data application.
The data storage layer is combined Libgit2 with user's space file system FUSE, constructs new file system.This article
Part system provides existing file system general API, compatible existing file operation;The spy for adding versions of data control function is also provided
There is API, complete versions of data and control peculiar function
The data access layer uses the rich information of RDF graph data database storing so that the relation between information can be stored completely
And without structure limitation, and can be any many data specifying-informations of each data storage;User can also be by certain data
Any description information retrieval data.
Data framework system has web access characteristic, and user can be by any one computer that can be interconnected with data, services
By browser access data application.And the data store organisation in Libgit2 is changed, original system can preserve two number evidences:Work
Area's data and Git object block data storages, this wastes memory space significantly.In the data storage layer of notebook data framework, only
The data in Git object blocks are preserved, without data are carried out with additional copy, nearly 50% memory space is saved.Modification Libgit2
In data retrieval mechanism, original system carries out data retrieval and access by the path of data;And in notebook data framework, data
No longer stored in the way of path, the retrieval of data is carried out only by unique identifier URI, therefore changed Libgit2
In data retrieval logic, make to carry out the access of data by URI.The present invention is based on richness of the RDF data storehouse to data
Information is designed, and builds foundation class table base, stores the general attribute of each data type, and each based on the extension of foundation class table
The particular attribute of individual data type.So that data type has stronger scalability, database also has stronger scalability.
Developer only needs to use the web front end development languages such as JavaScript, Html5 and CSS, just can easily develop complexity
Data application, complete complicated functional requirement.
In sum, a kind of data framework system of the invention, realizes for supporting data retrieval, data access, data to deposit
The Javascript API totally 54 of the functions such as storage, data syn-chronization/shared and data recovery, while ring during the operation of data framework
Realize that thus mixing application and development of the support based on Web technologies bring application and development difficulty and work by Node-Webkit in border
The obvious reduction that work is measured.Only need to provide the user under many equipment by doing data processing using front-end technology such as HTML, CSS
Data management function, development difficulty is small compared with traditional file manager application, and can operate in simultaneously Linux,
On the platforms such as Android, more than 50% code development workload is saved.So, the present invention effectively overcomes prior art
In various shortcoming and have high industrial utilization.
The above-described embodiments merely illustrate the principles and effects of the present invention, not for the limitation present invention.It is any to be familiar with this skill
The personage of art all can carry out modifications and changes under without prejudice to spirit and scope of the invention to above-described embodiment.Therefore, such as
Those of ordinary skill in the art completed under without departing from disclosed spirit and technological thought all etc.
Effect modifications and changes, should be covered by claim of the invention.
Claims (10)
1. a kind of data framework system, it is characterised in that including:
Data storage layer, for providing data basic access interface, the organizational form of the storage of data and setting data on disk;
Data access layer, loose coupling in the data storage layer, the interface for combining the data storage layer realize data access,
Organizational form of the setting data in internal memory.
2. data framework system according to claim 1, it is characterised in that the data storage layer includes user's space text
Part system, for controlling the time of Version Control in minimum data manipulation, and ensures the uniformity of data in system components.
3. data framework system according to claim 2, it is characterised in that the user's space file system includes:
Version control module, the version control function for realizing the data framework system;
File attribute expansion module, for basic document attribute extension to be formed the file attribute after extension.
4. data framework system according to claim 3, it is characterised in that the file attribute after the extension include music,
Document, contact person, video and picture.
5. data framework system according to claim 3, it is characterised in that the user's space file system also includes:
Index module, for being indexed to file according to type and version after send to the file attribute expansion module.
6. data framework system according to claim 1, it is characterised in that the data access layer includes system service mould
Block, for providing data access service in the form of system service.
7. data framework system according to claim 6, it is characterised in that the system service module includes:
Service acquisition module, provides or obtains service for superior equipment;
API module for reading and writing, data are directly accessed for the data framework system.
8. data framework system according to claim 7, it is characterised in that the service acquisition module includes data sharing
Unit, data recovery unit, data retrieval unit and data synchronisation unit.
9. data framework system according to claim 7, it is characterised in that the API module for reading and writing includes:
JavaScript API, for supporting the web front end technological development application program based on JavaScript, HTML, CSS,
And the data access API of data framework system offer is provided;
File system api, for directly reading and writing data by the data storage layer.
10. data framework system according to claim 6, it is characterised in that the data access layer also includes RDF numbers
According to storehouse, for data storage richness information.
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