Method of compound document comparison

• US 7,818,660 B2
• Filed: 05/30/2006
• Issued: 10/19/2010
• Est. Priority Date: 01/29/2006
• Status: Active Grant

• Current Assignee: Litera Technology LLC
• Original Assignee: Litera Technology LLC
• Inventors: Massand, Deepak
• Primary Examiner(s): DESAI, RACHNA SINGH
• Application Number:
  US11/444,140
• Publication Number:
  US 20080301193A1
• Time in Patent Office: 1,603 Days
• Field of Search: 715/209
• US Class Current: 715/209
• CPC Class Codes: G06F 16/258 Data format conversion from or to a database
• CPC Class Codes: G06F 16/33 Querying
• CPC Class Codes: G06F 40/194 Calculation of difference between files

Abstract

A method and system for comparing compound documents. An original compound document and a modified compound document are analyzed to determine and mark the location of embedded objects. A comparison is performed between an original primary document and the modified primary document, ignoring the embedded objects, the output of which is a comparison output document. The embedded objects are compared by copying the contents of the embedded objects to compatible documents, comparing the embedded object from the original compound document and the embedded object from the modified compound document, the output of which is inserted into the comparison output document using the location markers of the embedded objects.

Claims

1. A method of comparing compound documents, wherein a compound document comprises a primary document and an OLE object, comprising:

copying a first OLE object from a first compound document to a document of a type corresponding to an application that created the OLE object, creating a first OLE object comparison document;

copying a second OLE object from a second compound document to a second OLE object comparison document;

initiating a comparison engine to compare the first OLE object comparison document with the second OLE object comparison document, wherein the comparison engine generates a comparison output OLE object document;

placing the comparison output OLE object document in a comparison output document; and

initiating a primary document comparison engine to compare a first primary document and a second primary document, wherein the output of the comparison is included in the comparison output document.

2. The method of claim 1, wherein the primary document is one of a group consisting of a Word document, an Excel document, a PDF document, a Visio document, and a PowerPoint document.

3. The method of claim 1, wherein copying the first OLE object further comprises:

copying the first OLE object to a document of a type that may be opened by an application that created the first OLE object.

4. The method of claim 1, wherein placing the comparison output OLE object document in the comparison output document is performed in accordance with OLE object location information retrieved from the first compound document or the second compound document.

5. The method of claim 1, further comprising:

excluding an OLE object embedded in the compound document from comparison.

6. The method of claim 5, wherein the excluding occurs in response to a command from a user.

7. The method of claim 5, wherein the excluding occurs according to the document type of the OLE object.

8. A method of comparing documents, comprising:

determining that a first document comprising a first primary document contains an OLE object;

marking a first location of the OLE object;

copying the OLE object to a document of a type corresponding to a document type of the OLE object, creating a first discovered object comparison document;

determining that a second document comprising a second primary document contains a corresponding OLE object having the document type of the first OLE object;

marking a second location of the corresponding OLE object;

copying the corresponding OLE object to a second discovered object comparison document;

comparing the first primary document with the second primary document using a comparison engine that corresponds to a document type of the primary documents, generating a comparison output document from the results of the comparing;

comparing the first discovered object comparison document with the second discovered object comparison document using a comparison engine that corresponds to the document type of the OLE object;

inserting a result of the comparing of the first discovered object comparison document and the second discovered object comparison document in the comparison output document according to at least one of the first location and the second location; and

displaying the result of the comparing using a format that draws attention to differences.

9. The method of claim 8, further comprising:

in the event multiple OLE objects having different document types are discovered in the documents;

copying OLE objects of a first document type from the documents to a documents of a type corresponding to the first document type to create first type discovered object comparison documents;

copying OLE objects of a second document type from the documents to a documents of a type corresponding to the second document type to create second type discovered object comparison documents;

comparing the first type discovered object comparison documents with a comparison engine that corresponds to the first document type;

inserting a result of the comparing of the first type discovered object comparison documents into the comparison output document;

comparing the second type discovered object comparison documents with a comparison engine that corresponds to the second document type; and

inserting a result of the comparing of the second type discovered object comparison documents into the comparison output document.

10. The method of claim 8 wherein the format is one of a group consisting of a color format, an underline format, a bold format, and an italics format.

11. The method of claim 8 wherein the format is one of a group consisting of displaying additions with underlining and displaying deletions with strikethroughs.

12. A method of comparing documents, comprising:

receiving at least two input documents for comparison, wherein each input document comprises a primary document and an OLE object;

marking a first location of a first OLE object embedded in a first input document among the at least two input documents;

copying the first OLE object to a first object comparison document;

marking a second location of a second OLE object embedded in a second input document among the at least two input documents;

copying the second OLE object to a second object comparison document;

comparing primary documents of the at least two input documents;

creating a comparison output document from a result of the comparing of the primary documents of the at least two input documents;

comparing the first object comparison document and the second object comparison document; and

inserting a result of the comparing of the first object comparison document and the second object comparison document into the comparison output document.

13. The method of claim 12, wherein the inserting comprises:

inserting the result of the comparison according to at least one of the first location and the second location.

14. The method of claim 12 wherein the first object comparison document is of a type that corresponds to a document type of the first OLE object.

15. The method of claim 14, wherein the first object comparison document is of a same document type as the first OLE object.

16. The method of claim 15, wherein the primary document is one of a group consisting of a Word document, an Excel document, a PDF document, a Visio document, and a PowerPoint document.

17. The method of claim 16, wherein the document type of at least one of the first OLE object and the second OLE object is one of a group consisting of an Excel document type, a PowerPoint document type, a Visio document type, a PDF document type, a CAD document type, a JPEG document type, a GIFF document type, a TIFF document type, a PSD document type, a PNG document type, and a BIT MAP document type.

18. The method of claim 12, wherein the result of the comparing is displayed using a format that differentiates any changes in the comparison output document.

19. The method of claim 18 wherein the format is one of a group consisting of a color format, an underline format, a bold format, and an italics format.