CN106599321B - Plug-in for generation and analysis of DWG file annotation and signature and use method thereof - Google Patents
Plug-in for generation and analysis of DWG file annotation and signature and use method thereof Download PDFInfo
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- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/10—File systems; File servers
- G06F16/16—File or folder operations, e.g. details of user interfaces specifically adapted to file systems
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- G06F16/152—File search processing using file content signatures, e.g. hash values
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- G06F30/00—Computer-aided design [CAD]
Abstract
A plug-in for generating and analyzing endorsements and signatures of DWG format files comprises a generating plug-in and an analyzing plug-in, wherein the generating plug-in and the analyzing plug-in are respectively loaded in an AUTOCAD system; the generated plug-in comprises an electronic signature module, a mirror image processing module, an examination and annotation module, a file establishing module, a monitoring module and a composite module; the mirror image processing module is used for carrying out mirror image processing on the presentation layer of the DWG format file to obtain a mirror image file; the file establishing module is used for establishing a data stream file according to the operation version of the user and binding the data stream file with the mirror image file; the monitoring module is used for monitoring the operation content of a user and storing the operation content into a data stream file bound with the operation content; the compound module is used for compounding the data stream file into a compound file by taking the original DWG format file as a host; the analysis plug-in is used for analyzing the compound file. And the modification process of DWG file annotation and the one-to-one binding of data generated by different signers and digital signatures are realized by generating plug-ins.
Description
Technical Field
The invention relates to the field of computer aided design of engineering drawings, in particular to a DWG file annotation and signature generation plug-in, a DWG file annotation and signature analysis plug-in and a use method thereof.
Background
With the popularization of design software, electronic drawings in DWG format are widely applied to various design industries, many engineering design enterprises can intensively manage precious drawing data by applying drawing electronization and drawing management systems, and the centralized, networked and flow management of the drawings is gradually realized by continuously upgrading the systems.
The electronic drawings in the DWG format are subjected to a series of modification and verification from design to publishing. According to the networked management of the drawings, after the drawings are designed, the drawings are delivered to a checker for examination or annotation, and after the examination is passed, the engineering implementation, the final filing of the drawings and the electronic signature can be carried out; if the review fails, the drawing is returned to the designer with appropriate modifications and review.
The DWG format file has two major characteristics at present: 1. the composite structure relationship between the host file and the subordinate file is not supported; 2. no audit revision or annotation functionality is provided.
Aiming at the characteristics, the DWG format file has the following defects in practical application: 1. for an original DWG drawing, signers who cannot distinguish original data from newly added endorsement information respectively sign when newly added endorsement content is electronically signed; 2. in the DWG file which is annotated and modified, the newly added annotation information is process information and is not reserved in the final design drawing manuscript, but because the AutoCAD itself does not provide the functions of examining, revising or annotating, the relevant revision annotation information can be only distinguished manually, and is inconvenient in actual use; 3. for the original DWG file added with the digital signature, the original digital signature is invalid due to the fact that the annotation information is added, and the effect that even if the original paper is circled or annotated in the actual use process, the design content corresponding to the related signature is not affected can not be reproduced.
Therefore, after any modification, storage and transmission of the existing DWG format file, the modification process between restoration and the previous version of drawing can not be realized; and more than one digital certificate can not be injected into a single DWG format file, so that the one-to-one corresponding binding of the digital certificate and the electronic signature is realized.
Disclosure of Invention
Aiming at the defects of DWG format files, the application provides a generation plug-in, an analysis plug-in and a use method of DWG file annotation and signature.
According to a first aspect, an embodiment provides a plug-in for generating and parsing a DWG file annotation and signature, including a generating plug-in and a parsing plug-in, where the generating plug-in and the parsing plug-in are loaded in an AUTOCAD system respectively;
the generated plug-in comprises an electronic signature module, a mirror image processing module, a review annotation module, a file establishing module, a monitoring adding module and a composite module, wherein after the plug-in system is loaded in the AUTOCAD system, the electronic signature module and the review annotation module are automatically loaded in a menu bar of a DWG format file of the AUTOCAD system;
the electronic signature module is used for carrying out digital signature on the DWG format file;
the mirror image processing module is used for carrying out mirror image processing on the presentation layer of the DWG format file to obtain a mirror image file;
the file establishing module is used for establishing a data stream file according to the operation version of the user and binding the data stream file with the mirror image file;
the examination and annotation module is used for revising the mirror image file by a user;
the monitoring module is used for monitoring the operation content of a user and storing the operation content into a data stream file bound with the operation content, wherein the operation content comprises review comments and a digital signature;
the compound module is used for compounding the data stream file into a compound file by taking the original DWG format file as a host;
the analysis plug-in is used for analyzing the compound file.
In one embodiment, the electronic signature module is provided with an electronic signature tag and batch signature tags;
the electronic signature tag is used for carrying out digital signature on the current DWG format file;
the batch signature tag is used for batch signature of an external DWG format file.
In one embodiment, the electronic signature tag comprises a signature rule making unit, a seal stamping unit, a digital signature adding unit and a digital signature modifying unit;
the signature rule making unit is used for making a corresponding signature rule for a picture frame in the DWG format file;
the seal stamping unit is used for stamping an electronic seal on the DWG format file;
the added digital signature unit is used for digitally signing the current DWG format file according to the signature rule;
and the modifying digital signature unit is used for carrying out deletion, rotation or movement operation on the digital signature.
In one embodiment, the examination and annotation module is provided with an enabling annotation label, a checking annotation label and a closing annotation label;
enabling the comment label to be used for revising the mirror image file;
the viewing annotation label is used for displaying all current annotations in the DWG format file;
closing the annotation tag is used to clear all annotations currently in the DWG format file.
In one embodiment, the plug-in generation system further comprises a drawing synchronous comparison module, and the drawing synchronous comparison module is used for searching the before and after modification content of the DWG format image and positioning the modification content.
In one embodiment, the analysis plug-in comprises an analysis module, a redrawing module and an annotation generation module;
after the analysis plug-in is loaded in the AUTOCAD system, the analysis module is used for analyzing the data stream file in the composite file, the redrawing module is used for redrawing the analyzed data stream information on the presentation layer of the DWG format file, and the comment generation module is used for generating a list of comment information.
In one embodiment, the parsing plug-in further comprises a signature verification module for verifying whether the digital signature is valid.
According to a second aspect, an embodiment provides a method for using the plug-in generation and analysis, which includes the steps of:
loading the generated plug-in to the AUTOCAD system, and opening a DWG format file;
carrying out mirror image processing on the presentation layer of the opened DWG format file to obtain a mirror image file;
in the mirror image file, establishing a data stream file according to the operation version of a user, and binding the data stream file with the mirror image file;
monitoring operation content of a user and storing the operation content into a data stream file bound with the operation content, wherein the operation content comprises review comments and a digital signature;
compounding the data stream file into a compound file by taking the originally opened DWG format file as a host;
and loading the analysis plug-in into the AUTOCAD system, and analyzing the compound file.
In one embodiment, before mirroring the presentation layer of the opened DWG-formatted file, the method further includes digitally signing the DWG-formatted file, and specifically includes the steps of:
starting the electronic signature tag;
formulating a signature rule for a picture frame in a DWG format file;
inserting a signature lock;
and digitally signing the current DWG format file by using the signature lock according to the signature rule.
In one embodiment, before mirroring the presentation layer of the opened DWG-formatted file, the method further includes digitally signing the DWG-formatted file, and specifically includes the steps of:
starting the electronic signature label;
inserting a signature lock;
any one of the signature locations is selected to digitally sign the DWG formatted file with the signature lock.
In one embodiment, in the process of digitally signing the current DWG format file according to the signature rule, the method further includes the step of modifying the digital signature:
authorizing a signature lock of the digital signature to be modified;
the digital signature is modified using an authorized signature lock.
In one embodiment, in the process of digitally signing the current DWG format file according to the signature rule, the method further includes the step of batch signing the external DWG file:
starting batch signature tags;
selecting an external target DWG file;
and carrying out batch signature on the target DWG file according to a signature rule.
In one embodiment, parsing the compound file includes the steps of:
opening a DWG format file;
analyzing a data stream file in a compound file of the DWG format file;
redrawing the analyzed data stream information on a presentation layer of the DWG format file;
and generating an annotation list by using the annotation information of the analyzed data stream information.
In one embodiment, the process of parsing the compound file further includes the step of verifying whether the digital signature is valid.
According to the plug-in for generation and analysis of the embodiment, the generation plug-in is used for carrying out mirror image processing on the presentation layer of the DWG format file to obtain the mirror image file, the data stream file is established according to the operation version of a user, the data stream file is bound with the mirror image file, the analysis plug-in is used for analyzing the compound file, the analyzed annotation information is redrawn on the presentation layer, the generation plug-in realizes that the plurality of data stream files are bound on the data layer by taking the DWG format file as a host file, and the analysis plug-in shows the modification effect among different versions on the presentation layer, so that the problem that the modification process cannot be restored after the DWG file is modified is solved, and the effect that data generated by different signers are bound with corresponding digital certificates one by one is realized.
Drawings
FIG. 1 is a schematic diagram of the creation of a plug-in;
FIG. 2 is a schematic diagram of an analytic plug-in;
FIG. 3 is a block diagram of a seal unit session;
FIG. 4 is a drawing synchronization comparison module dialog block diagram;
FIG. 5 is a diagram of a comparison result of a drawing synchronization comparison module;
FIG. 6 is a diagram of modified positioning results;
FIG. 7 is a schematic diagram of an analytic plug-in;
FIG. 8 is a flowchart illustrating the use of plug-ins for plug-in generation and analysis;
fig. 9 is a flow chart of digital signature verification.
Detailed Description
The present invention will be described in further detail with reference to the following detailed description and accompanying drawings.
The first embodiment is as follows:
the embodiment provides a plug-in for generating and analyzing annotations and signatures of DWG format files, which specifically comprises a generating plug-in 1 and an analyzing plug-in 2, wherein the generating plug-in 1 and the analyzing plug-in 2 are respectively loaded in an AUTOCAD system, a user can realize multiple annotations and signatures of DWG format files by generating the plug-in 1 so as to realize one-to-one binding of data generated by different signers in a PDF file and corresponding digital certificates, and the user can check the modification process of the annotations by analyzing the plug-in 2.
Specifically, as shown in fig. 1, the plug-in 1 includes an electronic signature module 11, a mirror image processing module 12, an examination and annotation module 13, a file creation module 14, a monitoring module 15, and a composite module 16; when the generated plug-in 1 is loaded in the AUTOCAD system, the electronic signature module 11 and the examination and annotation module 13 are automatically loaded in a menu bar in a DWG format file of the AUTOCAD system; the electronic signature 11 is used for digitally signing the DWG format file, and the mirror image processing module 12 is used for carrying out mirror image processing on the presentation layer of the DWG format file to obtain a mirror image file; the file establishing module 14 is used for establishing a data stream file according to the operation version of the user and binding the data stream file with the image file; the examination and annotation module 13 is used for the user to revise the mirror image file; the monitoring module 15 is used for monitoring the operation content of the user and saving the operation content into the data stream file bound with the operation content, wherein the operation content comprises an examination comment and a digital signature; the composition module 16 is configured to compose the data stream file into a composition file by using the original DWG format file as a host.
Specifically, an electronic signature tag 111 and a batch signature tag 112 are arranged in a pull-down menu bar of the electronic signature module 11, wherein the electronic signature tag 111 is used for digitally signing a current DWG format file, and the batch signature tag 112 is used for batch signing an external DWG format file; when the user starts the electronic signature 11, if only the digital signature is performed on the current DWG format file, the electronic signature tag 111 is further started, and the management tool bar displayed by the electronic signature tag includes a signature rule making unit 1111, a stamping unit 1112, and a modified digital signature unit 1114 that adds the digital signature unit 1113.
The signature rule making unit 1111 is configured to make a corresponding signature rule for a frame in a DWG format file, and a dialog box shown in fig. 2 may pop up after clicking the signature rule making unit 1111, where the specific signature rule is as follows: clicking a 'selection' button beside a 'frame block name', selecting a corresponding frame, adding a responsible person position to be added in the 'label name', corresponding to a signer position in the frame, selecting the signature position, performing frame selection at the signature position of the selected frame, setting the signature position, and finally clicking the 'addition' button to find that the 'signature rule' is set and displayed on a page.
Because various electronic seals such as ' seal of drawing ' need be stamped in DWG file, the stamp stamping unit 1112 of this example is used for stamping electronic stamps on DWG format file, this electronic stamp accords with the requirement of the electronic signature law of the people's republic of China, can not be caught, can not modify, for the file that has been stamped the electronic stamp, once modifying, this electronic stamp can become invalid, pop out the dialog box as shown in FIG. 3 when the user clicks the stamp stamping unit 1112, if only need stamp the electronic stamp on current DWG file, only need click the definite button, if need stamp in batches to outside DWG file, then need click the drawing lot, select required drawing, can accomplish batch stamping.
The added digital signature unit 1113 is used for digitally signing DWG format files according to signature rules, in order to ensure that the file conforms to the regulation of 'electronic signature data is controlled only by a signer during signing' of the thirteenth clause of 'signature Law', the generation plug-in 1 of the embodiment is configured in a mode of 'one person, one seal, one lock and one CA', namely, when the CAD electronic signature is signed, the signer needs to insert the signature lock and log in an account to input an account password to complete the whole signing work, specifically, the signature lock is inserted firstly, the account password corresponding to the signature lock is input, and the signature is determined by clicking, and the CAD electronic signature of the embodiment does not change the personal signature style, is a unique physical vector watermark and has non-tamper property.
Since the original operations of deletion, movement, modification, and the like of the CAD cannot be used for the CAD electronic signature, and the digital signature automatically disappears when the signed DWG file is modified, the modifying digital signature unit 1114 in this embodiment can perform operations of deletion, rotation, or movement on the signed digital signature, specifically, the movement is taken as an example for description: the corresponding modification operation can only be completed by the signature lock authorization of the signer, so that when the modification operation is performed, the corresponding signature lock of the signature to be modified needs to be inserted first, the 'mobile digital signature' button is clicked, the account password of the corresponding signature lock is input, the signature to be moved is clicked, the position to be moved is selected, and the movement operation is completed.
The batch signature tag 112 of the present example is implemented by a batch electronic signature tool in a CAD background, and specifically, the batch electronic signature tool calls a CAD program through an external EXE to perform batch signature and PDF conversion on a target DWG file and add a PDF digital signature.
The review annotation module 13 of this example is provided with an enabling annotation tag 131, a viewing annotation tag 132, and a closing annotation tag 133, where the enabling annotation tag 131 is used to revise the mirror image file; the view annotation tag 132 is used for displaying all current annotations in the DWG format file, and supporting the view of merging and deleting revised versions; the close annotation tag 133 is used to clear all annotations currently in the DWG format file.
The plug-in 1 generation module of the embodiment further comprises a drawing synchronous comparison module 17, wherein the drawing synchronous comparison module 17 is used for searching the front and back modification content of the DWG format image and positioning the modification content, and specifically, firstly selecting vertical tiling in the CAD window function; clicking a window synchronization button to enable the two drawings to achieve synchronous display of the same screen window; clicking a screen menu 'drawing synchronous comparison module 17', as shown in fig. 4, selecting a document dialog box to be compared, and respectively selecting two drawings; then clicking a drawing pre-analysis button to analyze whether the drawing has overall deviation or not, and avoiding excessive modification display caused by overall deviation in the comparison process; popping up the information that the comparison of the drawings is finished, checking the comparison result, and automatically popping up a message dialog box after the comparison is finished, as shown in fig. 5, wherein when the 'newly added object' is double-clicked, the second sub-image is automatically switched to, and the object is amplified and selected; when the 'delete object' is double-clicked, automatically switching to the first sub-graph, amplifying and selecting the object; when the "modified object" is double clicked, this object is enlarged and selected on both graphs at the same time, as shown in fig. 6.
As shown in fig. 7, the parsing plug-in 2 of this embodiment includes a parsing module 21, a redrawing module 22, and an annotation generating module 23, where after the parsing plug-in 2 is loaded in the AUTOCAD system, the parsing module 21 is configured to parse a data stream file in a compound file, the redrawing module 22 is configured to redraw parsed data stream information on a presentation layer of a file in a DWG format, and the annotation generating module 23 is configured to generate a list of annotation information.
Further, the parsing plug-in 2 further comprises a signature verification module 24, and the signature verification module 24 is configured to verify whether the digital signature is valid.
Example two:
based on the generation and analysis plug-in of the first embodiment, the present embodiment provides a corresponding using method thereof, and a flowchart thereof is shown in fig. 8, and includes the following steps.
S1: and loading the generated plug-in into an AUTOCAD system, and opening the DWG format file.
S2: and carrying out mirror image processing on the presentation layer of the opened DWG format file to obtain a mirror image file.
Subsequent operations only perform data processing on the image file, and the original DWG format file is not affected.
To prove that the present example operates on an image file, before performing image processing, the present example may also perform digital signature on an original DWG format file, specifically: starting the electronic signature tag; formulating a signature rule for a frame in a DWG format file, and formulating a corresponding signature rule according to a signature rule formulation unit in the first embodiment; inserting a signature lock; and digitally signing the original DWG format file by using the signature lock according to the signature rule.
In other embodiments, the digital signature may not be performed according to the signature rule, for example, any signature position may be freely selected, and then the signature lock is used to digitally sign the DWG format file.
After signing, the method also comprises the following steps of modifying the digital signature: authorizing a signature lock of the digital signature to be modified; and modifying the digital signature by using the authorized signature lock, specifically according to the modified digital signature unit in the first embodiment.
In the process of signing, batch signing can be carried out on external DWG format files according to the needs, and the steps are as follows: starting batch signature tags; selecting an external target DWG file; and carrying out batch signature on the target DWG file according to the signature rule.
S3: and in the mirror image file, establishing a data stream file according to the operation version of the user, and binding the data stream file and the mirror image file.
Since the user may modify the data stream for a plurality of times according to one version, or may create one version each time, in this example, the corresponding data stream file is created according to the operation version of the user.
S4: monitoring the operation content of the user and saving the operation content into a data stream file bound with the operation content, wherein the operation content comprises review comments and a digital signature.
When the specific annotation information is clicked, the effects of automatic drawing positioning and flickering prompting can be achieved, and similarly, when the mouse is placed in an annotation area, the corresponding annotation information can be displayed in a floating window mode.
Meanwhile, under the operation interface, a user can delete, add, modify and the like the annotation information and digitally sign the data generated by the operation, so that the modified data and the corresponding digital certificates are bound one by one, and the modified content is directly modified for the bound data stream file instead of the original DWG format file.
S5: and compounding the data stream file into a compound file by taking the original DWG format file as a host.
If the compound file is not analyzed, the annotation information and the corresponding signature information cannot be checked from the presentation layer of the DWG format file, and only the original information of the DWG format file can be checked.
S6: and loading the analysis plug-in into an AUTOCAD system to analyze the compound file.
Specifically, a DWG format file is opened; analyzing a data stream file in a compound file of the DWG format file; redrawing the analyzed data stream information on a presentation layer of the DWG format file; and generating an annotation list by using the annotation information of the analyzed data stream information.
The process of analyzing the compound file also comprises the step of verifying whether the digital signature is valid, for example, when the compound file is analyzed, the cipher text is decrypted by using a private key of a receiving party to obtain a plaintext text, then the plaintext text is encrypted in a single direction to obtain an information summary, meanwhile, the digital signature is decrypted by using a public key of a sending party to obtain an information requirement, finally, whether the two information summaries are the same is compared, if so, the digital signature is valid, otherwise, the digital signature is invalid, and the verification flow chart is shown in fig. 9.
When newly adding annotation information and a digital signature to the DWG file according to the first embodiment or the second embodiment, the specific operations are the operations on the data stream file, but not the original DWG file, the binding of the plurality of data stream files and the original DWG file is realized on the data layer, the modification effect among different versions is shown on the presentation layer, and the defects of the existing DWG format file are overcome.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
Claims (14)
1. A plug-in for generation and analysis of annotation and signature of a DWG format file is characterized by comprising a generation plug-in and an analysis plug-in, wherein the generation plug-in and the analysis plug-in are respectively loaded in an AUTOCAD system;
the generating plug-in comprises an electronic signature module, a mirror image processing module, a review annotation module, a file establishing module, a monitoring module and a composite module, and after the generating plug-in is loaded in the AUTOCAD system, the electronic signature module and the review annotation module are automatically loaded in a menu bar of a DWG format file of the AUTOCAD system;
the electronic signature module is used for carrying out digital signature on the DWG format file;
the mirror image processing module is used for carrying out mirror image processing on the presentation layer of the DWG format file to obtain a mirror image file;
the file establishing module is used for establishing a data stream file according to the operation version of a user and binding the data stream file with the mirror image file;
the examination and annotation module is used for revising the image file by a user;
the monitoring module is used for monitoring the operation content of a user and storing the operation content into a data stream file bound with the operation content, wherein the operation content comprises an examination comment and a digital signature;
the compound module is used for compounding the data stream file into a compound file by taking an original DWG format file as a host;
the analysis plug-in is used for analyzing the compound file.
2. The generating and parsing plug-in of claim 1, wherein the electronic signature module is provided with an electronic signature tag and a batch signature tag;
the electronic signature tag is used for digitally signing the current DWG format file;
the batch signature tag is used for carrying out batch signature on an external DWG format file.
3. The generating and parsing plug-in of claim 2, wherein the electronic signature tag comprises a signature rule making unit, a stamping unit, an adding digital signature unit and a modifying digital signature unit;
the signature rule making unit is used for making a corresponding signature rule for a picture frame in the DWG format file;
the seal stamping unit is used for stamping an electronic seal on the DWG format file;
the digital signature adding unit is used for digitally signing the DWG format file according to the signature rule;
and the modifying digital signature unit is used for deleting, rotating or moving the digital signature.
4. The generate, parse plug-in of claim 1, wherein the review annotation module is provided with an enable annotation tag, a view annotation tag, and a close annotation tag;
the annotation enabled tag is used for revising the image file;
the viewing annotation label is used for displaying all current annotations in the DWG format file;
the close annotation tag is used to empty all current annotations in the DWG format file.
5. The generation and parsing plug-in of claim 1, wherein the generation plug-in further comprises a drawing synchronization comparison module, and the drawing synchronization comparison module is configured to find modified content before and after the DWG-formatted file and locate the modified content.
6. The generate, parse plugin of claim 1, wherein the parse plugin comprises a parse module, a redraw module, and an annotation generation module;
after the analysis plug-in is loaded in the AUTOCAD system, the analysis module is used for analyzing the data stream file in the composite file, the redrawing module is used for redrawing the analyzed data stream information on a presentation layer of the DWG format file, and the annotation generation module is used for generating a list of annotation information.
7. The generate, parse plug-in of claim 6, wherein the parse plug-in further comprises a signature verification module to verify whether the digital signature is valid.
8. A method for using a generating and parsing plug-in according to any one of claims 1-7, comprising the steps of:
loading the generated plug-in to the AUTOCAD system, and opening a DWG format file;
carrying out mirror image processing on the presentation layer of the opened DWG format file to obtain a mirror image file;
in the mirror image file, establishing a data stream file according to an operation version of a user, and binding the data stream file with the mirror image file;
monitoring operation content of a user and storing the operation content into a data stream file bound with the operation content, wherein the operation content comprises review comments and a digital signature;
compounding the data stream file into a compound file by taking an original DWG format file as a host;
and loading the analysis plug-in into the AUTOCAD system to analyze the compound file.
9. The use method according to claim 8, wherein before the mirroring process is performed on the presentation layer of the opened DWG-formatted file, the method further comprises digitally signing the DWG-formatted file, and specifically comprises the steps of:
starting the electronic signature label;
formulating a signature rule for the picture frame in the DWG format file;
inserting a signature lock;
and digitally signing the DWG format file by using the signature lock according to the signature rule.
10. The use method according to claim 8, wherein before the mirroring process is performed on the presentation layer of the opened DWG-formatted file, the method further comprises digitally signing the DWG-formatted file, and specifically comprises the steps of:
starting the electronic signature label;
inserting a signature lock;
and selecting any signature position to digitally sign the DWG format file by using the signature lock.
11. The method of use according to claim 9, wherein said process of digitally signing the current DWG-formatted file according to the signature rules further comprises the step of modifying the digital signature:
authorizing a signature lock of the digital signature to be modified;
and modifying the digital signature by using an authorized signature lock.
12. The method of use of claim 10, wherein the process of digitally signing the current DWG format file according to the signature rules further comprises the step of bulk signing the external DWG files:
starting the batch signature tags;
selecting an external target DWG file;
and carrying out batch signature on the target DWG file according to the signature rule.
13. The method of use of claim 8, wherein said parsing the compound file comprises the steps of:
opening a DWG format file;
analyzing a data stream file in the compound file of the DWG format file;
redrawing the analyzed data stream information on a presentation layer of the DWG format file;
and generating an annotation list by using the annotation information of the analyzed data stream information.
14. The method of use of claim 13, wherein parsing the compound file further comprises verifying whether the digital signature is valid.
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| CN107169739A (en) * | 2017-05-17 | 2017-09-15 | 广州普邦园林股份有限公司 | A kind of approving and forwarding approval and sign method and system of landscape design project construction drawing |
| CN108549623B (en) * | 2018-04-12 | 2022-03-01 | 北京三快在线科技有限公司 | Collaborative document editing control method and device, electronic equipment and storage medium |
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