8. Computer readable media comprising program code that when executed by a programmable processor causes the processor to execute a method for extracting semantic information from unstructured text associated with a plurality of content items, each content item having associated metadata, the computer readable media comprising: program code for selecting an ordered set of scale values for a plurality of scales; program code for determining for each scale value at least one subset of metadata related to a subset of the scale value; program code for determining for each of the scales and associated subsets a statistic on occurrences of one or more content items from the subset of metadata, the statistic comprising a number of instances of the one or more content items in a respective scale and subset; program code for aggregating the statistics for each scale and associated subsets and determining therefrom a semantic level for each scale and associated subsets; program code for determining which of the plurality of scales correspond to the semantics of the one or more content items on the basis of the semantic level; program code for identifying one or more clusters of scales and having a semantic level that exceeds a threshold value of occurrences; and program code for extracting semantic information from the metadata associated with the one or more content items of one or more identified cluster of scales.
8. Computer readable media comprising program code that when executed by a programmable processor causes the processor to execute a method for extracting semantic information from unstructured text associated with a plurality of content items, each content item having associated metadata, the computer readable media comprising: program code for selecting an ordered set of scale values for a plurality of scales; program code for determining for each scale value at least one subset of metadata related to a subset of the scale value; program code for determining for each of the scales and associated subsets a statistic on occurrences of one or more content items from the subset of metadata, the statistic comprising a number of instances of the one or more content items in a respective scale and subset; program code for aggregating the statistics for each scale and associated subsets and determining therefrom a semantic level for each scale and associated subsets; program code for determining which of the plurality of scales correspond to the semantics of the one or more content items on the basis of the semantic level; program code for identifying one or more clusters of scales and having a semantic level that exceeds a threshold value of occurrences; and program code for extracting semantic information from the metadata associated with the one or more content items of one or more identified cluster of scales. 13. The computer readable media of claim 8 , wherein the metadata comprises time information regarding a time the at least one content item was created.