Semantic network of bioinformatics resources (using method 2 and values shown in Figure 4). Node size represents frequency in the corpus; edge thickness represents how similar the two connected nodes are. Node colour is determined by the semantic class of the node: red for Data, green for Data resource, blue for Algorithm and yellow for Application. (A) The scores based on binary weights. (B) The scores based on tf*idf. The image was generated using Cytoscape , the network was laid out using the Cytoscape layout algorithm ‘Edge-Weighted Spring Embedded’, using the edge weight data in the network.