WO2001018648A2 - Dynamic management of content served by an information service - Google Patents
Dynamic management of content served by an information service Download PDFInfo
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- WO2001018648A2 WO2001018648A2 PCT/US2000/022981 US0022981W WO0118648A2 WO 2001018648 A2 WO2001018648 A2 WO 2001018648A2 US 0022981 W US0022981 W US 0022981W WO 0118648 A2 WO0118648 A2 WO 0118648A2
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- Prior art keywords
- content
- wherem
- content provider
- repository
- service
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/95—Retrieval from the web
- G06F16/958—Organisation or management of web site content, e.g. publishing, maintaining pages or automatic linking
Definitions
- the invention relates to information services, and more particularly, to systems, methods and articles of manufacture for allowing the set of content provided by an information service to be dynamically modified
- the internet has become an important medium for information services and electronic commerce. As the internet was commercialized, organizations initially established their presence in cyberspace by making available relatively static information, including generalized descriptions of products and services More recently, dynamic content has become popular For example, electronic commerce sites now typically present product offe ⁇ ngs and pricing information that varies over time. Similarly, internet news services offer news related content that is routinely updated Search engines and portals similarly offer content that is updated over tune. Often access is provided to time varying content through a relatively fixed set of interfaces resolved at runtime using technologies such as server side mcludes (SSI), Common Gateway Interface (CGI) scripts, JavaTM Servlets and Java Server Pages (JSP) implementations based on software available from Sun Microsystems, Inc. and Active Server Pages (ASP) implementations based on software available from
- SSLI server side mcludes
- CGI Common Gateway Interface
- JSP JavaTM Servlets
- Java Server Pages Java Server Pages
- Java and all Java-based marks and logos are trademarks or registered trademarks of Sun Microsystems, Inc. m the United States and other countries.
- infrastructure e.g., CGI scripts, servlets, JSP or ASP pages and embedded code
- dynamic content is provided usmg static infrastructure to access database content that is itself dynamic Modifications to the CGI scripts, servlets, JSP or ASP pages and embedded code for accessing databases or other backend services such as credit card validation, search, payment settlement, order processmg, etc typically require code and HTML modifications, recompilation and new code releases
- information services must typically be interrupted for addition, removal or change to a set of content providing components
- Systems and methods are desired that allow content provider components to be added, removed or changed without base code recompilation, package installation or information service downtime.
- a content provider manager and desktop service described herem provide for "pluggable" content that may be modified simply through (1) changes to the set of content provider components encoded in a repository therefor and (2) responsive changes in the set of instantiated content providers served by the configuration.
- a single repository provides a mechanism for additions to, removals from and or changes m the set of content providing components served by multiple information service installations
- a method of modifying content served by a networked information service mcludes instantiating a set of one or more content provider classes, supplymg a client application with content correspondmg to the mstantiated content providers, updatmg the set of mstantiated content providers without interruption of the networked information service, and thereafter supplymg the client application with content correspondmg to the updated set of mstantiated content providers
- the set of instantiated content providers is based on encoded representations thereof in a content provider directory and the updated set of mstantiated content providers is based on changes to content provider directory.
- the updatmg mcludes, for each new content provider, instantiatmg a correspondmg new class and addmg the correspondmg mstantiated class to a list of content providers available to the networked information service.
- the updatmg further mcludes, for each removed content provider, destroying a correspondmg previously mstantiated class and removmg the correspondmg previously instantiated class from the list of content providers available to the networked information service
- a method of updatmg content served by an information resource without interrupting operation of the information resource cludes instantiating m accordance with a content repository, a set of software objects implementing respective content sources, addmg to, and removing from, the set of mstantiated software objects in correspondence with additions to, and deletions from, the content repository, and, m response to a request from a client application, selecting for execution those of the set of software objects consistent with associated user parameters; executmg the selected software objects; and supplymg the client application with content sourced from the selected software objects
- the mstantiated software objects are executable by the information resource without recompilation of the information resource and without a service interrupting restart thereof
- the client application mcludes a web browser
- the content supplymg m cludes organizmg content from the selected software objects and supplymg the organized content to the web browser as
- a method of providing a dynamically variable set of content mstances m an information resource environment cludes predefining at least one repository for encodmg one or more content mstances of the set of content instances; instantiating, in response to addition to the set of content mstances of an encodmg for a first content mstance, the first content mstance within the information resource environment without interruption thereof, and thereafter, presentmg the first content mstance as part of the information resource environment.
- the method further mcludes dissociating, in response to removal from the set of content mstances of an encodmg for a second content mstance, the second content instance from the information resource environment without interruption thereof, and thereafter, presentmg the information resource environment without the second content mstance
- the method further mcludes remstantiatmg, m response to modification of an encoding for a third content mstance, the third mstance withm the information resource environment based on the modified encodmg, and thereafter, presentmg a modified third content mstance as part of the information resource environment The remstantiatmg is without interruption of the information resource environment
- a networked information system mcludes a content manager service responsive to client requests for access to content providers and means for updatmg a set of mstantiated content providers m correspondence with changes m a repository therefor and without interrupting client request servicing by the content manager
- the content manager instantiates the set of the content providers encoded in the repository
- a computer program product encoded m at least one computer readable medium mcludes content provider manager code and information service code
- the content provider manager code is executable on one or more computers as a content provider manager service to mamtam a time-varying set of mstantiated content provider objects m correspondence with a content provider repository
- the information service code is executable to service incoming requests for information content
- the mterface code services the incoming requests with information content from the time- varymg set of instantiated content provider objects Changes to the time- varymg set of mstantiated content provider objects are supported without a service interrupting recompilation or restart of the information service code
- the information service code implements a web portal or a desktop service
- FIG. 1 depicts an exemplary configuration of components providmg dynamic management of content m accordance with an embodiment of the present invention
- FIG. 2 is a flow chart depictmg mteraction of various components of a dynamic content provider management configuration in accordance with an embodiment of the present invention
- FIG. 3 is a network diagram illustrating a configuration m accordance with the present mvention, wherem a dynamically updateable content provider repository allows content provided by multiple network applications to be updated
- FIG. 4 illustrates a screen presentation of a web portal application integrating content from multiple content providers each dynamically updateable m accordance with an embodiment of the present mvention
- FIG. 1 illustrates components of an exemplary configuration for dynamically managing a set of content providers
- FIG. 1 illustrates components of an exemplary configuration for dynamically managing a set of content providers
- some aspects of the present mvention are desc ⁇ bed herem in the context of content provider types, media content and messagmg mterfaces typical of web portal applications and browser technologies Nonetheless, based on the description herem, persons of ordinary skill m the art will appreciate applications to information services, in general, wherem dynamic management of the set of underlymg information sources is provided without interruption of the information service
- content provider manager 140 dynamically loads a set of content providers (e g , provider 151, provider 152, and provider 153) m correspondence with contents of a content provider repository (e g , content provider repository 130)
- Content provider repository 130 encodes representations of a set of available content providers (e g , as representation 131, representation 132 and representation 133) Initially, content provider manager 140 loads (2) a set of content providers based on the contents of content provider repository 130 Thereafter, the loaded set 192 of components is mamtamed m accordance with contents of content provider repository 130
- content provider manager 140 periodically checks content provider repository 130 for additions, deletions, or changes to the set of content provider representations encoded therein Other timings, e g , event triggered, m response to access requests, etc , may be implemented m other configurations
- content provider manager 140 dynamically loads a content provider or content providers in accordance with the change For example, m the case of an addition to repository 130 (e g , added content provider representation 134) content provider 140 detects the addition and dynamically loads (2 A) content provider 154 m response thereto
- content provider manager 140 similarly detects the deletion (e g , of representation 132) and deallocates a correspondmg loaded content provider (e g , content provider 152) m response thereto
- Content provider manager 140 also detects modifications to content provider representations (e g , to content provider representation 131) In response to a detected modification, content provider manager 140 reloads a correspondmg content provider (e g , content provider
- One realization of a uniform content provider mterface is as an "interface" that defines the methods a content provider object must support Classes implementing the mterface are defined for each content provider (e g , m encoded form in content provider repository 130)
- an “interface” that defines the methods a content provider object must support Classes implementing the mterface are defined for each content provider (e g , m encoded form in content provider repository 130)
- a content provider interface is as follows
- Hashtable userData ) ; public Properties getProperties () ; public String getProperty ( String key ), ⁇ wherein content provider implementations particular to a given web desktop or portal application each implement the getHTMLContent, getHTMLEditForm, getHTMLHelpContent, processEditForm, getProperties, and getProperty methods
- a method implementing getHTMLEditForm returns an HTML edit form for modifying content provider properties and/or preferences
- the returned HTML edit form is typically supplied by web desktop/ portal application 120 to a client application (e g , a browser) for display to a user, entry of properties and/or preferences by the user, and postmg back to web desktop/ portal application 120
- a method implementing getHTMLEditForm for a stock quote content provider mstance may return an HTML edit form allowing a user to select particular ticker symbols for tracking and/or allowing a user to specify a particular presentation of data (e
- content provider repository 130 is implemented as a file system directory accessible to content provider manager 140
- individual content provider representations e g , representations 131, 132, 133, and 134
- content provider manager 140 detects changes to the set of representations simply by using file system facilities mdicatmg the time at which the content provider directory was last changed
- content provider manager 140 checks the individual representations to determine the set of added, removed and or updated representations m the repository
- Other content provider repository configurations are also envisioned For example, m configurations providmg centralized management of content served by dist ⁇ mped web desktop/ portal applications, content provider repository 130 may be implemented as a network accessible resource such as a callable information service, a database system, a remotely accessible file system, etc In this way, update to a smgle network
- representations of content provider implementations are encoded m content provider repository 130 in compressed form as Java Archive (jar) files
- jar Java Archive
- Both implementing class definitions and HTML templates for use by an mstantiated content provider are typically mcluded m a jar file representation
- content provider manager 140 uncompresses contents of the correspondmg jar file and loads implementing classes into an execution environment
- Other realizations may employ other encodmgs (e g , other archive formats, compressed and uncompressed formats, indirect encodmgs referencmg a separate store, etc ) without departmg from the spi ⁇ t and scope of the mvention as recited in the appended claims
- instantiation of a loaded content provider may be deferred until a request is received from web desktop/ portal application 120 for the added or changed content provider
- instantiation may be comcident with loadmg
- content provider manager 140 may simply update its internal list of content provider mterfaces to remove the deleted content provider mstance. Modifications to an implementing class are handled by loadmg the new class defin ⁇ t ⁇ on(s) and updatmg content provider manager's internal list to identify the newly loaded class.
- content provider manager 140 may omit deallocation of a removed or replaced content provider. For example, in implementations based on virtual machme environments providmg automated memory management (e.g , garbage collection) application directed deallocation may be unnecessary.
- content provider manager 140 may dynamically load a correspondmg set of content providers without mstantiatmg mstances thereof.
- dynamically loaded content providers e.g., providers 151, 152, 153, and 154
- dynamically loaded content providers maybe mstantiated comcident with loadmg.
- dynamically loaded content providers 192 are shown distmct from underlymg data stores (e.g., data store 161, data store 162, data store 163, and data store 164). Based on the desc ⁇ ption herem, persons of ordinary skill m the art will appreciate a wide variety of data stores suitable for mteraction with content providers. For example, data stores may mclude data base management systems, mcludmg relational data base management systems, files, callable mterfaces to applications, etc.
- Content providers e.g., content providers 151, 152, 153, and/or 154) supply information based on data represented in zero or more of such data stores. For example, a given content provider may draw information from multiple data stores to present an mtegrated presentation thereof. Alternatively, a content provider need not interface with any external data store.
- dynamically loaded content providers 192 can mclude any dynamically loaded software component capable of supplymg information content suitable for presentation by an information service (e.g , by web desktop/ portal application 120).
- an information service e.g , by web desktop/ portal application 120.
- content provided by a particular content provider implementation may mclude.
- directory content such as yellow pages information, employee list information, etc ;
- mterfaces to communications facilities such as for voice messagmg; text messagmg, audio, visual, or audiovisual broadcast and/or pomt-to-pomt media content; etc.; and (7) real-time or near-real-time data presentations, such as of financial, stock price, system status, traffic flow, or manufacturing process control data, etc ,
- supplied information content may take a va ⁇ ety of forms, e g , encoded as HTML, images, movmg picture formats, audio content, sc ⁇ pts, Java programming language code, etc
- supplied information mcludes media or multimedia content suitable for presentation to a human user at a browser
- other configurations may supply information content suitable for non-human clients, e g , for automated agents, real-time data applications, etc
- the information service can be made "content agnostic," l e , essentially without knowledge of the particular content it serves to clients
- configuration management can be improved (e g , addition, deletion and modification of functionality are facilitated)
- content may be supplied with a higher level of configurability and customization than otherwise typically available
- information service implementations will exhibit performance scalable to large sets of content providers, and mamtenance is facilitated by allowing replacement content provider components to be installed without regression m other portions of a desktop or portal application
- a client application e g , browser 110 queries a network application implementing the desktop or web portal 120
- browser 110 operating on behalf of a particular user (not shown) may query desktop/web portal 120 for a user customized desktop or portal presentation
- a client application e g , browser 110
- a network application implementing the desktop or web portal 120
- browser 110 operating on behalf of a particular user (not shown) may query desktop/web portal 120 for a user customized desktop or portal presentation
- an exemplary exploitation as a web portal is illustrative Persons of ordmary skill in the art will recognize a wide variety of existing portal applications, mcludmg those built around search engme facilities such as MY YAHOO, MY ALTAVISTA, SNAP com, etc , those built around news organization content such as myCNN com or MSNBC com or others such as MY NETSCAPE as illustrative of the type of content that may be presented m usmg facilities of the present m
- desktop/portal 120 obtams (11, 12) an encodmg or list of currently available content providers from content provider manager 140 in response to a request (10) from browser 110 Based on the list of available content providers, desktop portal 120 obtams content from at least a subset of the available content providers
- desktop/portal 120 selects from amongst the available content providers based on user preferences and/or permissions or roles
- sophisticated authentication, authorization and permission facilities may be employed to rest ⁇ ct access to particular content providers or to particular data presented thereby
- authentication, aufho ⁇ zation, permissions, and roles may be unnecessary
- User preferences may also define a subset of the available content providers for which a given user will receive mtegrated content
- user preferences may be established withm the context of a given session or may be persistent across sessions Facilities for tracking users across session context (e g , usmg cookies or through authentication of a principal ID) will be appreciated
- dynamically loaded content providers may be mstantiated m response to a request from desktop portal 120 for cu ⁇ ently available content providers
- a smgle mstance of each available content provider may be mstantiated
- each mstantiated content provider should be "thread-safe" so that transactions from multiple browsers will be handled approp ⁇ ately
- multiple mstances of a content provider may be instantiated as appropriate for load balance or corresponding to individual browser sessions
- desktop/portal 120, content provider manager 140 and each of the dynamically loadable content providers 192 are implemented withm a application or web server environment For example, each maybe implemented usmg servlet technology m the context of a Java web server implementation In such an implementation, desktop/portal 120 and content provider manager 140 may be loaded on application initialization based on contents of class path, whereas the content providers themselves (e g , content providers 151
- FIG. 2 illustrates a flow chart of operations m an exemplary implementation providmg dynamic content in accordance with the present mvention
- FIG. 2 illustrates a first process (delimited by begm 205 and end 206) by which contents of a content provider repository 230 are added to, removed from or updated
- a second essentially asynchronous process is delimited by begin 203 and delay 204
- This second essentially asynchronous process checks repository 230 for changes As described above with reference to FIG.
- the current set of content providers is represented as a content provider list 220 that is accessible to a desktop or portal process which is desc ⁇ bed below
- the set 250 of currently available content providers e g , provider 251, provider 252, provider 253, provider 254 changes m accordance with the set of content providers represented m repository 230
- additions, removals and updates to repository 230 are dynamically reflected m a current set of providers 250 that, m some realizations is represented m content provider list 220
- a desktop or portal component receives 241, are request such as for a user customized desktop
- cu ⁇ ent provider list 220 is checked for the cu ⁇ ent set of available content providers
- permission, roles and preferences associated with the user are checked so that a proper subset of cu ⁇ ently available content providers may be employed to generate mtegrated content for return to a request m client application
- preferences 272 may also affect both the presentation and organization of mformation supplied from content providers, as well as the set of content providers employed
- a set of dynamically loaded and dynamically mstantiated content providers are employed to supply mformation content that is selected from organized and transmitted (244) to a client application (e g , a browser) m response to received request 241
- client application e g , a browser
- operation of the desktop/portal component e g , from begm 201 to end 202 is essentially asynchronous with update of the cu ⁇ ently available set of content providers 250, which is itself essentially asynchronous from the addition, removal and update of content provider encodmgs m content provider repository 230
- lockmg of shared resources e g , of content provider repository 230, content provider list 220, and/or mstantiated providers 250
- updates to the set of cu ⁇ ently loaded and/or mstantiated content providers may be event driven, e g , m direct response to modifications to repository 230
- content provider repository 230 may be checked for changes m response to operation of the desktop/portal component
- content provider repository 230 may be checked m response to a user request or in response to a supply of content from the cu ⁇ ent set 250 of providers, although an essentially asynchronous configuration is presently prefe ⁇ ed for performance reasons
- FIG. 2 illustrates mteractions of a smgle process updatmg contents of a smgle content provider repository
- multiple mdependent add, remove and or update flows may operate to affect the set of content providers encoded m content provider repository 230
- multiple mdependent business organizations may separate post, remove or supply updated releases of content providers to content repository 230
- content provider repository 230 may be implemented as one or more physical stores
- distmct busmess organizations may mamtain separate stores which together form a distributed implementation of content provider repository 230 In such configurations, checks (251) to the dist ⁇ ubbed content provider repository may be performed
- FIG. 2 illustrates a smgle desktop/portal implementation and a smgle set 250 of cu ⁇ ently available providers
- FIG.3 is a network diagram illustrating such a geographically dist ⁇ ubbed configuration. In the configuration of FIG.
- a set 130 A of content provider encodmgs is represented at a content provider repository hosted by a server 311 on network 310
- Repository 130A is available over network 301, which may mclude a public switch telecommunications network, a private internet and/or other communications infrastructure, to geographically dist ⁇ ubbed application server implementations 321 and 331.
- repository 130A encodes representations of a superset of content providers 1, 2, 3 . N, and the two application web servers 321 and 331 host desktop, portal or other similar applications mtegratmg content provided by mstantiated subsets of the content providers.
- application web server 321 mtegrates content from content providers PI and P2
- application web server 331 mtegrates content from content providers PI and P3.
- updatmg repository 130A with an encodmg of content provider N
- both application web server 321 and 331 may be dynamically updated to mclude, load and mstantiate content provider PN, and thereby make available content associated therewith to respective client applications. Removals of content providers from repository 130A and updates to content providers encoded m repository 130A may similarly be supplied to application web servers 321 and 331 as described above with reference to FIGS. 1 and 2
- FIG. 4 illustrates a screen configuration m which multiple screen presentations co ⁇ espondmg to multiple backmg content provider mstances are a ⁇ anged m accordance with user preferences
- the set of content providers made available to a user is determined in accordance with permissions and roles associated with the user.
- the screen presentation of FIG. 4 is illustrative of several forms of content that may be supplied by backmg content provider mstances (e.g , providers 251, 252, 253 .. 254) usmg facilities such as desc ⁇ bed above with reference to FIGS. 1 and 2
- a screen presentation 401 co ⁇ esponds to a Yellow Pages content provider
- Screen presentation 402 co ⁇ esponds to a content provider implementing search facilities
- Screen presentation 403 co ⁇ esponds to a content provider implementing a zip code based movie show time look-up.
- Screen presentation 404 co ⁇ esponds to a content provider implementing a launch facility for various network based applications.
- Screen presentation 405 co ⁇ esponds to a content provider supplymg user ID and user ID related information
- Screen presentation 406 co ⁇ esponds to a content provider supplymg server status information
- Screen presentation 407 co ⁇ esponds to a content provider supplymg press release mformation from one or more sources
- Screen presentation 408 co ⁇ esponds to a content provider supplymg news headlmes from one or more sources
- Screen presentation 409 co ⁇ esponds to a content provider supplymg stock price information.
- Screen presentation 410 co ⁇ esponds to a content provider implementing a jump to network URL facility.
- screen presentation 411 co ⁇ esponds to a content provider supplymg advertising mformation.
- screen presentations 401, 402, 403, 404, 405, 406, 407, 408, 409, 410 and 411 are exemplary of a wide variety of co ⁇ espondmg content providers that may be dynamically managed usmg facilities m accordance with the present mvention, they are by no means exhaustive. Based on the desc ⁇ ption herem, persons of ordmary skill m the art will appreciate a wide va ⁇ ety of content providers and associated screen presentations that may be employed Usmg facilities desc ⁇ bed above with reference to FIGS. 1, 2 and 3, backmg content provider implementations may be added, removed or updated dynamically and made available to desktop or web portal applications In the context of FIG.
- such dynamically variable sets of content providers may be personalized in accordance with user preferences by selectmg screen locations for presentmg content associated therewith Usmg the facilities desc ⁇ bed above m the context of FIGS. 1, 2 and 3, content providers may be added to the set available for inclusion m a user's personalized desktop without interrupting and/or restarting the desktop or web portal service with which the user mteracts
- the addition or update of a particular component for example, a stock portfolio content provider component co ⁇ espondmg to screen presentation 409 may be added or updated to multiple desktop or portal implementations dist ⁇ ubbed throughout the world, throughout an organization, etc by updating a single content provider repository
- the dynamically pluggable aspects of implementations m accordance with the present invention provide a substantial advantage by decouplmg the addition, removal and/or update of content provider components from the desktop or portal implementation
- Content provider implementations may be updated or added all without interrupting operation of a desktop
- At least some of the above-desc ⁇ bed components are implemented as servlets executable m the context of a commercially-available web server environment
- the Netscape Enterprise Server architecture with extensions for certificate handlmg, HyperText Transfer Protocol (HTTP), Secure Sockets Layer (SSL) support, and JavaTM Servlet Support available from Netscape Communications Corporation and Sun Microsystems, Inc is one suitable environment
- Netscape is a registered trademark of Netscape Communications Corporation m the United States and other countries
- Java and all Java-based marks and logos are trademarks or registered trademarks of Sun Microsystems, Inc in the United States and other counr ⁇ es
- the desc ⁇ ption herem is focused on aspects of a dynamically managed set of content providers, rather than on peculia ⁇ ties of a particular implementation environment, it is envisioned that implementations in accordance with the teachmgs of the present mvention may be implemented m the context of many commercially-available networked information service environments, mcludmg web server environments, as well as
- mstances may be provided for components desc ⁇ bed herem as a smgle mstance Fmally, boundaries between various components, services, servlets, and data stores are somewhat arbitrary, and particular operations are illustrated m the context of specific illustrative configurations Other allocations of functionality are envisioned and may fall withm the scope of claims that follow Structures and functionality presented as discrete components m the exemplary configurations may be implemented as a combmed structure or component
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Priority Applications (3)
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AU69234/00A AU6923400A (en) | 1999-09-07 | 2000-08-22 | Dynamic management of content served by an information service |
DE60002353T DE60002353D1 (en) | 1999-09-07 | 2000-08-22 | DYNAMIC MANAGEMENT OF INFORMATION CONTENT DISTRIBUTED BY AN INFORMATION SERVICE |
EP00957645A EP1216442B1 (en) | 1999-09-07 | 2000-08-22 | Dynamic management of content served by an information service |
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US09/391,010 | 1999-09-07 | ||
US09/391,010 US6516349B1 (en) | 1999-09-07 | 1999-09-07 | System for updating a set of instantiated content providers based on changes in content provider directory without interruption of a network information services |
Publications (2)
Publication Number | Publication Date |
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WO2001018648A2 true WO2001018648A2 (en) | 2001-03-15 |
WO2001018648A3 WO2001018648A3 (en) | 2002-04-18 |
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PCT/US2000/022981 WO2001018648A2 (en) | 1999-09-07 | 2000-08-22 | Dynamic management of content served by an information service |
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EP (1) | EP1216442B1 (en) |
AU (1) | AU6923400A (en) |
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WO (1) | WO2001018648A2 (en) |
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Also Published As
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AU6923400A (en) | 2001-04-10 |
US6516349B1 (en) | 2003-02-04 |
EP1216442A2 (en) | 2002-06-26 |
EP1216442B1 (en) | 2003-04-23 |
WO2001018648A3 (en) | 2002-04-18 |
DE60002353D1 (en) | 2003-05-28 |
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