Abstract: Among other things, publishers of digital content are enabled each to define, for each of one or more digital content items, a style in which the digital content item is to be presented to a user and a condition under which the user may have the digital content item presented. The digital content items are stored in a content library, the styles and conditions associated with the digital content items are stored in a server. Each of the digital content items is enabled to be presented to users within presentation contexts that are accessible to the users and controlled by presentation context providers. The presentation of the digital content items includes obtaining the digital content items from the server and controlling the presentation to occur under the conditions and in the styles defined by the publishers.

Abstract: Among other things, publishers of digital content are enabled each to define, for each of one or more digital content items, a style in which the digital content item is to be presented to a user and a condition under which the user may have the digital content item presented. The digital content items are stored in a content library, the styles and conditions associated with the digital content items are stored in a server. Each of the digital content items is enabled to be presented to users within presentation contexts that are accessible to the users and controlled by presentation context providers. The presentation of the digital content items includes obtaining the digital content items from the server and controlling the presentation to occur under the conditions and in the styles defined by the publishers.

Abstract: Among other things, publishers of digital content are enabled each to define, for each of one or more digital content items, a style in which the digital content item is to be presented to a user and a condition under which the user may have the digital content item presented. The digital content items are stored in a content library, the styles and conditions associated with the digital content items are stored in a server. Each of the digital content items is enabled to be presented to users within presentation contexts that are accessible to the users and controlled by presentation context providers. The presentation of the digital content items includes obtaining the digital content items from the server and controlling the presentation to occur under the conditions and in the styles defined by the publishers.

Abstract: Among other things, publishers of digital content are enabled each to define, for each of one or more digital content items, a style in which the digital content item is to be presented to a user and a condition under which the user may have the digital content item presented. The digital content items are stored in a content library, the styles and conditions associated with the digital content items are stored in a server. Each of the digital content items is enabled to be presented to users within presentation contexts that are accessible to the users and controlled by presentation context providers. The presentation of the digital content items includes obtaining the digital content items from the server and controlling the presentation to occur under the conditions and in the styles defined by the publishers.

Abstract: Among other things, publishers of digital content are enabled each to define, for each of one or more digital content items, a style in which the digital content item is to be presented to a user and a condition under which the user may have the digital content item presented. The digital content items are stored in a content library, the styles and conditions associated with the digital content items are stored in a server. Each of the digital content items is enabled to be presented to users within presentation contexts that are accessible to the users and controlled by presentation context providers. The presentation of the digital content items includes obtaining the digital content items from the server and controlling the presentation to occur under the conditions and in the styles defined by the publishers.

Abstract: Among other things, publishers of digital content are enabled each to define, for each of one or more digital content items, a style in which the digital content item is to be presented to a user and a condition under which the user may have the digital content item presented. The digital content items are stored in a content library, the styles and conditions associated with the digital content items are stored in a server. Each of the digital content items is enabled to be presented to users within presentation contexts that are accessible to the users and controlled by presentation context providers. The presentation of the digital content items includes obtaining the digital content items from the server and controlling the presentation to occur under the conditions and in the styles defined by the publishers.

Abstract: Among other things, a publisher of digital content items is enabled to select a digital content item to offer to another party who will present it to users. The publisher defines terms under which the other party may present the digital content item to the users and receives a request from the other party to permit the other party to present the digital content item to the users. The request includes a location of a presentation context to which the request applies. The publisher is enabled to respond to the request.