1. A method for determining a multiplicity of predecessor relationships, the method comprising: identifying multiple predecessor documents for a single successor document in an online analytical processing (OLAP) system using a data structure from an online transaction processing (OLTP) system including, accessing the data structure stored within the OLTP system, wherein the data structure includes a representation of an object tree that includes relational information specifying relationships between objects and sub-objects of the objects and relationships among the sub-objects, the object tree further includes representations of a successor object associated with a first document, successor sub-objects having items of the first document, a first predecessor object associated with a second document, a first predecessor sub-object having an item of the second document, a second predecessor object associated with a third document, a second predecessor sub-object having an item of the third document; extracting first relationship information based on the relational information, the first relationship information indicating a first sub-object relationship between the first predecessor object and the first predecessor sub-object and a second sub-object relationship between the second predecessor object and the second predecessor sub-object; extracting second relationship information based on the relational information, the second relationship information indicating a third sub-object relationship between the successor object and each of the successor sub-objects; and extracting third relationship information based on the relational information, the third relationship information indicating a first predecessor sub-object relationship between at least one successor sub-object and the first predecessor sub-object based on the item of the second document being same as an item of the first document, and a second predecessor sub-object relationship between at least one successor sub-object and the second predecessor sub-object based on the item of the third document being same as an item of the first document; deducing a first predecessor relationship between the successor object and the first predecessor object based the first, second, and third relationship information such that the second document is identified as a predecessor of the first document; and deducing a second predecessor relationship between the successor object and the second predecessor object based on the first, second, and third relationship information such that the third document is identified as a predecessor of the first document.