1. A system for enabling in-context authoring of substitute content for one or more non-textual objects, comprising: a memory to access an electronic document comprising content data that includes sentences and at least one non-textual object contextually placed in a first position within the sentences; and an authoring environment that facilitates in-context editing of substitute content corresponding to the at least one non-textual object, comprising: an interactive output interface that presents the substitute content positioned in the first position within the sentences and presents at least a portion of the sentences positioned adjacent to the first position to enable a user to contextually review the substitute content with respect to the sentences; and an interactive input interface that enables a user to edit the substitute content positioned within the first position in response to editing commands and enables the user to store the substitute content to the electronic document.
3. A system according to claim 1 , wherein the adjacent sentence portions comprises at least one of a sentence portion positioned immediately preceding and a sentence portion immediately following the physical placement of the non-textual object in the first position.