Abstract: The invention refers to a method creating a data structure including many data elements comprising the steps of receiving multiple data elements to be stored from an input data structure, providing a continuous array in memory, allocating memory space within the continuous array for the data elements and storing the data elements in the allocated memory space. In particular, the invention refers to a method for creating a tree based dictionary from data elements received from an input structure. Moreover, it refers to a method for searching data structures including tokens by means of a tree based dictionary and a method for annotating tokens in a data structure. The invention does also refer to corresponding computer systems, software and storage media.