1. In a computer system having a graphical user interface including a display and a user interface selection device, a method of interactively merging data from a line-of-business (LOB) application into a document template, the document template having one or more schema nodes, the method comprising: marking up the document template with a plurality of schema nodes, wherein each of the plurality of schema nodes is a placeholder for merging business data from the LOB application, and wherein marking up the document template includes: accessing meta-data from the LOB application, wherein the meta-data represents a hierarchical structure of business data stored in a database, wherein the LOB application manages the business data, and wherein business data includes a plurality of business objects, wherein a first one of the plurality of business objects is linked to a second one of the plurality of business objects by a relationship; attaching a schema to the document template, wherein the schema facilitates modeling business data based on the accessed meta-data; and attaching the plurality of schema nodes to the document template; determining a current schema node within the document template, wherein the schema node is mapped to the document template; determining a business object associated with the current schema node; formulating a data query based on the current schema node mapped to the document template; sending the data query to the LOB application; receiving business data from the LOB application; displaying a context-sensitive user interface on the display based on the business object associated with the current schema node, the context-sensitive user interface comprising the business data from the LOB application corresponding to the business object associated with the current schema node; receiving, via the user interface selection device, a user selection of one or more instances of the business data from the LOB application; creating a data-merged document by copying the one or more instances of the business data from the LOB application to the current schema node within the document template based on the user selection; and maintaining an active link between the data-merged document and the LOB application to allow for interactive merging, wherein the active link is maintained after copying the one or more instances of the business data from the LOB application to the current schema node.