PIDF-LO Format Extension for Geospatial Content Tagging
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Solution Overview
Problem
Conventional location services and content delivery systems primarily focus on associating location information with individuals or entities, rather than with content, limiting the ability to geographically tag and deliver location-aware multimedia content effectively over networks.
Innovation Solution
The method involves modifying the Presence Information Data Format-Location Object (PIDF-LO) to associate geospacial location information with XML content on a network by using a universal resource locator (URL) within the PIDF-LO compliant document, allowing location-aware content tagging and delivery using standardized Internet protocols like IP, SIP, and SOAP.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If location information is associated with individuals or entities using conventional location services, then location tracking and subscriber information retrieval is improved, but the ability to geographically tag and deliver location-aware multimedia content is limited
Solution Approach 1:
The patent introduces a modified PIDF-LO format as an intermediary data structure that bridges location information and multimedia content. This modified format allows geographic data to be associated with content objects (images, videos, audio) rather than only with individuals, enabling location-aware content delivery while maintaining compatibility with existing location services infrastructure.
Solution Approach 2:
The modified PIDF-LO format serves multiple functions: it continues to support traditional location tracking for individuals while simultaneously enabling geographic tagging of multimedia content. This universal format allows the same data structure to handle both person-based location services and content-based location awareness, eliminating the need for separate systems.
2Adaptability or versatility
If conventional PIDF-LO format is used for presence information, then standardized Internet protocol compatibility is maintained, but direct association of geospacial location with XML content is not enabled
Solution Approach 1:
The patent embeds content identification elements (such as object URLs or content references) within the existing PIDF-LO document structure. By nesting content references inside the presence information framework, the patent enables content-location association without creating a completely new system, thus maintaining compatibility while adding functionality.
Solution Approach 2:
The modification involves changing the semantic parameters of the PIDF-LO format to include content-specific fields while maintaining the overall document structure. This allows the format to represent both traditional presence information and content location associations through parameter extensions rather than structural redesign.
Data Source
AI summary
The format of the Presence Information Data Format-Location Object (PIDF-LO) as defined by the Internet Engineering Task Force (IETF) is extended or modified to accommodate, within the standard PIDF-LO format, an association of geospacial location to XML content on the Internet. A geospacial location is associated with Extensible Markup Language (XML) content on the Internet. The XML content is identified by a universal resource locator (URL), and associated with geospatial location information (either a specific location, zone, or direction). The URL is inserted into a <presence . . . > section of a Presence Information Data Format-Location Object (PIDF-LO) compliant document as defined by the Internet Engineering Task Force (IETF). In this way, geospacial location information is associated with Internet based XML content using a standard PIDF-LO format.