Abstract: Disclosed are methods, systems, and computer program products for updating a web application displayed on a client machine. In some implementations, a server maintains a database of application identifiers identifying instances of one or more web applications. The server receives, from a first client machine, a communication identifying a first web application and a first application identifier, the instance of the first web application being associated with one or more components. The server determines that the first application identifier is not included in the database of application identifiers, and generates an updated application identifier for the instance of the first web application based on component version identifiers of the one or more components. The server stores the updated application identifier and transmits a notification to the first client machine indicating that the instance of the first web application is out-of-date.

Abstract: Disclosed are methods, systems, and computer program products for updating a web application displayed on a client machine. In some implementations, a server maintains a database of application identifiers identifying instances of one or more web applications. The server receives, from a first client machine, a communication identifying a first web application and a first application identifier, the instance of the first web application being associated with one or more components. The server determines that the first application identifier is not included in the database of application identifiers, and generates an updated application identifier for the instance of the first web application based on component version identifiers of the one or more components. The server stores the updated application identifier and transmits a notification to the first client machine indicating that the instance of the first web application is out-of-date.

Abstract: Disclosed are methods, systems, and computer program products for updating a web application displayed on a client machine. In some implementations, a server maintains a database of application identifiers identifying instances of one or more web applications. The server receives, from a first client machine, a communication identifying a first web application and a first application identifier, the instance of the first web application being associated with one or more components. The server determines that the first application identifier is not included in the database of application identifiers, and generates an updated application identifier for the instance of the first web application based on component version identifiers of the one or more components. The server stores the updated application identifier and transmits a notification to the first client machine indicating that the instance of the first web application is out-of-date.

Abstract: Disclosed are methods, systems, and computer program products for updating a web application displayed on a client machine. In some implementations, a server maintains a database of application identifiers identifying instances of one or more web applications. The server receives, from a first client machine, a communication identifying a first web application and a first application identifier, the instance of the first web application being associated with one or more components. The server determines that the first application identifier is not included in the database of application identifiers, and generates an updated application identifier for the instance of the first web application based on component version identifiers of the one or more components. The server stores the updated application identifier and transmits a notification to the first client machine indicating that the instance of the first web application is out-of-date.

Abstract: Disclosed are methods, systems, and computer program products for updating a web application displayed on a client machine. In some implementations, a server maintains a database of application identifiers identifying instances of one or more web applications. The server receives, from a first client machine, a communication identifying a first web application and a first application identifier, the instance of the first web application being associated with one or more components. The server determines that the first application identifier is not included in the database of application identifiers, and generates an updated application identifier for the instance of the first web application based on component version identifiers of the one or more components. The server stores the updated application identifier and transmits a notification to the first client machine indicating that the instance of the first web application is out-of-date.

Abstract: Disclosed are methods, systems, and computer program products for updating a web application displayed on a client machine. In some implementations, a server maintains a database of application identifiers identifying instances of one or more web applications. The server receives, from a first client machine, a communication identifying a first web application and a first application identifier, the instance of the first web application being associated with one or more components. The server determines that the first application identifier is not included in the database of application identifiers, and generates an updated application identifier for the instance of the first web application based on component version identifiers of the one or more components. The server stores the updated application identifier and transmits a notification to the first client machine indicating that the instance of the first web application is out-of-date.

Abstract: Content is managed and provided to users over a communications link using a differencing engine. The differencing engine is configured to selectively cause content to be refreshed in a cache. Specifically, the differencing engine is configured to detect whether a more recent version of a data item is available, and if so, delete a current version of the data item from the cache and retrieve and store in the cache the more recent version of the data item. Content is selected for refresh based upon a set of one or more selection criteria. The selection criteria may include, for example, the source of content, the size of content, the age of content, the type of content and users to which the content is being provided.