1. A method implemented by a client device for managing electronic documents including metadata related to broadcasting multimedia content, the method comprising: receiving an electronic document at the client device, the electronic document including metadata related to broadcasting multimedia content and having a defined structure including two or more structural elements, each of the two or more structural elements associated with a respective identifier and a respective version value representing a corresponding date; sending a request from the client device to a server for an update to the electronic document, wherein the request includes a first version value representing a first date; receiving an update document at the client device in response to the request, wherein the update document includes both updated information and invalidity information for the electronic document, wherein the updated information includes one or more structural elements updated after the first date, and the invalidity information includes a first identifier and a second version value representing a second date to indicate invalidity of a first structural element that has the first identifier and is associated with the second date, and wherein said first identifier is reused in the update to the electronic document for identifying a second structural element other than the first structural element; and processing the received invalidity information at the client device to identify the invalid first structural element based on the first identifier and the corresponding second version value.
1. A method implemented by a client device for managing electronic documents including metadata related to broadcasting multimedia content, the method comprising: receiving an electronic document at the client device, the electronic document including metadata related to broadcasting multimedia content and having a defined structure including two or more structural elements, each of the two or more structural elements associated with a respective identifier and a respective version value representing a corresponding date; sending a request from the client device to a server for an update to the electronic document, wherein the request includes a first version value representing a first date; receiving an update document at the client device in response to the request, wherein the update document includes both updated information and invalidity information for the electronic document, wherein the updated information includes one or more structural elements updated after the first date, and the invalidity information includes a first identifier and a second version value representing a second date to indicate invalidity of a first structural element that has the first identifier and is associated with the second date, and wherein said first identifier is reused in the update to the electronic document for identifying a second structural element other than the first structural element; and processing the received invalidity information at the client device to identify the invalid first structural element based on the first identifier and the corresponding second version value. 3. The method of claim 1 , wherein said electronic document is in XML format.