DYNAMIC EXTERNAL ENTITY RESOLUTION IN AN XML-BASED CONTENT MANAGEMENT SYSTEM

• US 20080072138A1
• Filed: 09/20/2006
• Published: 03/20/2008
• Est. Priority Date: 09/20/2006
• Status: Active Grant

• Current Assignee: X Corp. (f/k/a Twitter, Inc.) (X Holdings Corp.)
• Original Assignee: International Business Machines Corporation
• Inventors: Cragun, Brian J., Herbeck, David G., Petri, John E.
• Granted Patent: US 7,752,542 B2
• Time in Patent Office: Days
• US Class Current: 715/236
• CPC Class Codes: G06F 16/83 Querying
• CPC Class Codes: G06F 16/93 Document management systems

Abstract

Embodiments of the invention provide a method, system, and article of manufacture for dynamically resolving external entity references in a document managed by a content management system (CMS). In one embodiment, a wrapper transform may be applied to a source transform to generate a modified source transform. The modified source transform may be configured to generate resolvable external entity references when applied to a document being accessed from the CMS. The modified source transform may be applied to the document being checked out to generate an output document, and the output document may be returned in response to an access request.

Claims

1. A method for providing dynamic external entity resolution in a content management system (CMS), comprising:

receiving a request to access a document from the CMS, wherein the document is associated with at least one source transform;

applying a wrapper transform to the source transform to generate a modified source transform, wherein the modified source transform is configured to generate an output document with resolvable external entity references when the modified source transform is applied to the document being accessed;

applying the modified source transform to the document being accessed to generate the output document; and

returning the output document to a requesting application.

2. The method of claim 1, wherein the document being accessed is an XML document, and wherein the source transform is configured to generate an HTML document from the XML document.

3. The method of claim 2, wherein the external entity reference is an anchor <

a>

tag or an image <

img>

tag with an href attribute specifying a relative path location for a target document.

4. The method of claim 1, wherein the source transform and the wrapper transform are XSLT transforms.

5. The method of claim 1, wherein the modified source document is an HTML document which may be rendered by a browser, and wherein each external entity reference in the HTML document is an HTTP hyperlink referencing a URL resolveable by the requesting application.

6. The method of claim 1, wherein the request to access the document comprises one of a request to check out the document from the CMS, a request to view the document in the CMS, and a request to export the document from the CMS.

7. The method of claim 1, wherein applying a wrapper transform to the source transform to generate a modified source transform, comprises:

identifying an external entity reference in the source transform;

identifying the target of the external entity reference;

determining whether the target includes a location identified by a relative path; and

if so, invoking a URL generation method to generate a fully qualified URL; and

replacing the relative path the fully qualified URL.

8. The method of claim 7, wherein the URL generation method determines a fully qualified URL for the relative path from a catalog mapping relative paths to resolvable fully qualified URLs.

9. The method of claim 1, wherein applying the wrapper transform to the source transform comprises sequentially applying a plurality of wrapper transforms.

10. A computer-readable storage medium containing a program which, when executed, performs an operation for providing dynamic external entity resolution in a content management system (CMS), comprising:

receiving a request to access a document from the CMS, wherein the document is associated with at least one source transform;

applying a wrapper transform to the source transform to generate a modified source transform, wherein the modified source transform is configured to generate resolvable external entity references when applied to the document being accessed;

applying the modified source transform to the document being checked out to generate an output document; and

returning the output document to a requesting application.

11. The computer-readable storage medium of claim 10, wherein the document being accessed is an XML document, and wherein the source transform is configured to generate an HTML document from the XML document.

12. The computer-readable storage medium of claim 11, wherein the external entity reference is an anchor <

a>

tag or an image <

img>

tag with an href attribute specifying a relative path location for a target document.

13. The computer-readable storage medium of claim 10, wherein the source transform and the wrapper transform are XSLT transforms.

14. The computer-readable storage medium of claim 10, wherein the modified source document is an HTML document which may be rendered by a browser, and wherein each external entity reference in the HTML document is an HTTP hyperlink referencing a URL resolveable by the requesting application.

15. The computer-readable storage medium of claim 10, wherein the request to access the document comprises one of a request to check out the document from the CMS, a request to view the document in the CMS, and a request to export the document from the CMS.

16. The computer-readable storage medium of claim 10, wherein applying a wrapper transform to the source transform to generate a modified source transform, comprises:

identifying an external entity reference in the source transform;

identifying the target of the external entity reference;

determining whether the target includes a location identified by a relative path; and

if so, invoking a URL generation method to generate a fully qualified URL and replacing the relative path the fully qualified URL.

17. The computer-readable storage medium of claim 16, wherein the URL generation method determines a fully qualified URL for the relative path from a catalog mapping relative paths to resolvable document locations in the CMS.

18. The computer-readable storage medium of claim 10, wherein applying the wrapper transform to the source transform comprises sequentially applying a plurality of wrapper transforms.

19. A system, comprising:

a processor; and

a memory containing a content management system (CMS) configured to perform a method for providing dynamic external entity resolution, including performing the steps of;

receiving a request to access a document from the CMS, wherein the document is associated with at least one source transform,

applying a wrapper transform to the source transform to generate a modified source transform, wherein the modified source transform is configured to generate resolvable external entity references when applied to the document being accessed,

applying the modified source transform to the document being checked out to generate an output document, and

returning the output document to a requesting application.

20. The system of claim 19, wherein the document being accessed is an XML document, and wherein the source transform is configured to generate an HTML document from the XML document.

21. The system of claim 19, wherein applying a wrapper transform to the source transform to generate a modified source transform, comprises:

identifying an external entity reference in the source transform;

identifying the target of the external entity reference;

determining whether the target includes a location identified by a relative path; and

if so, invoking a URL generation method to generate a fully qualified URL, and replacing the relative path the fully qualified URL.

22. The system of claim 19, wherein the request to access the document comprises one of a request to check out the document from the CMS, a request to view the document in the CMS, and a request to export the document from the CMS.