# US 9,519,621 B2 · Deterministic rendering of active content > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,519,621 B2 - Document ID: US9519621B2 - Status: Granted - Kind: B2 - Application number: 11/479,849 - Filed: 2006-06-30 - Published: 2008-01-03 - Granted: 2016-12-13 - Earliest claimed: 2006-06-30 - Assignees: Adobe Systems Incorporated - Applicants: James D. Pravetz; Richard Cohn; William Ie - Inventors: James D. Pravetz; Richard Cohn; William Ie - Web page: https://patentgrep.com/patent/US9519621B2 ## CPC - G06F 40/103: Formatting, i.e. changing of presentation of documents (automatic justification G06F40/189; automatic line break hyphenation G06F40/191) - G06F 21/64: Protecting data integrity, e.g. using checksums, certificates or signatures - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract Active content is deterministically rendered in a stable format that is independent of any particular targeted environment, which the active content may subsequently be rendered to. Environmental and dynamic dependencies are removed from a specification associated with the active content for purposes of producing a stable and consistent specification for the active content. The stable and static specification is used to subsequently render the active content into the stable format for any targeted or desired environment. ## Claims ### Claim 1 A method comprising: receiving a request to view a stable form of an active document from a content viewer, the active document including variable sub-content and deterministic sub-content; determining the variable sub-content is rendered with a plurality of visual appearances by a plurality of renderers; determining the deterministic sub-content is rendered with a single visual appearance by the plurality of renderers; generating the stable form of the active document by rendering the active document with the deterministic sub-content and without the variable sub-content; and presenting the stable form of the active document within the content viewer. ### Claim 2 (depends on 1) The method of claim 1, wherein the generating of the stable form of the active document includes producing a deterministic format specification for the stable form of the active document. ### Claim 3 (depends on 1) The method of claim 1, wherein the generating of the stable form of the active document includes omitting the variable sub-content from the stable form of the active document. ### Claim 4 (depends on 1) The method of claim 1 further comprising: determining that a presentation attribute of the variable sub-content fails to conform to a format specification; substituting a default attribute for the presentation attribute; and modifying the variable sub-content with the default attribute; wherein the stable form of the active document includes the modified variable sub-content. ### Claim 5 (depends on 1) The method of claim 1 further comprising: converting an original specification of the active document to a stable specification corresponding to the stable form of the active document. ### Claim 6 A machine-accessible storage medium comprising instructions that, when executed by one or more processors of a machine, cause the machine to perform a method comprising: receiving a request to view a stable form of an active document from a content viewer, the active document including variable sub-content and deterministic sub-content; determining the variable sub-content is rendered with a plurality of visual appearances by a plurality of renderers; determining the deterministic sub-content is rendered with a single visual appearance by the plurality of renderers; generating the stable form of the active document by rendering the active document with the deterministic sub-content and without the variable sub-content; and presenting the stable form of the active document within the content viewer. ### Claim 7 (depends on 6) The machine-accessible storage medium of claim 6, wherein the generating of the stable form of the active document includes producing a deterministic format specification for the stable form of the active document. ### Claim 8 (depends on 6) The machine-accessible storage medium of claim 6, wherein the generating of the stable form of the active document includes omitting the variable sub-content from the stable form of the active document. ### Claim 9 (depends on 6) The machine-accessible storage medium of claim 6, wherein the method further comprises: determining that a presentation attribute of the variable sub-content fails to conform to a format specification; substituting a default attribute for the presentation attribute; and modifying the variable sub-content with the default attribute; wherein the stable form of the active document includes the modified variable sub-content. ### Claim 10 (depends on 6) The machine-accessible storage medium of claim 6, wherein the method further comprises: converting an original specification of the active document to a stable specification corresponding to the stable form of the active document. ### Claim 11 A system comprising: a machine to execute instructions; and a machine-readable medium storing the instructions thereon, the instructions, when executed by the machine, to cause the machine to perform steps including; receiving a request to view a stable form of an active document from a content viewer, the active document including variable sub-content and deterministic subcontent; determining the variable sub-content is rendered with a plurality of visual appearances by a plurality of renderers; determining the deterministic sub-content is rendered with a single visual appearance by the plurality of renderers; generating the stable form of the active document by rendering the active document with the deterministic sub-content and without the variable sub-content; and presenting the stable form of the active document within the content viewer. ### Claim 12 (depends on 11) The system of claim 11, wherein the generating of the stable form of the active document includes producing a deterministic format specification for the stable form of the active document. ### Claim 13 (depends on 11) The system of claim 11, wherein the generating of the stable form of the active document includes omitting the variable sub-content from the stable form of the active document. ### Claim 14 (depends on 11) The system of claim 11, wherein the steps further include: determining that a presentation attribute of the variable sub-content fails to conform to a format specification; substituting a default attribute for the presentation attribute; and modifying the variable sub-content with the default attribute; wherein the stable form of the active document includes the modified variable sub-content. ### Claim 15 (depends on 11) The system of claim 11, wherein the steps further include: converting an original specification of the active document to a stable specification corresponding to the stable form of the active document.