Patent ID: 7831559

Claim:
A computer method for analysis of a corpus of one or more unstructured objects, the corpus having a first composition at a first time and a second composition, different from the first composition, at a second time, the corpus being organized based on a user-defined hierarchy, the user-defined hierarchy defining one or more proper subsets of the corpus interrelated through parent-child relationships, the one or more proper subsets containing one or more unstructured objects, comprising: receiving a user's selection of a key concept, wherein the key concept is one or more words or phrases present in the content of an unstructured object that represent the unstructured object; if the key concept is present in the corpus at the first time, determining a first degree of presence of the key concept in the corpus at the first time, and if the key concept is absent from the corpus at the first time, determining a first absence of the key concept in the corpus at the first time; if the key concept is present in the corpus at the second time, determining a second degree of presence of the key concept in the corpus at the second time, and if the key concept is absent from the corpus at the second time, determining a second absence of the key concept in the corpus at the second time; and displaying an indication of the first degree presence or first absence, and of the second degree of presence or second absence.