3. A computer implemented method, comprising: accessing document identifiers for documents; scanning the documents to determine values comprising searchable terms in the documents that are members of a set of values, wherein the set of values comprises at least one of an integer and a real number; generating a number of posting lists associated with a first level, wherein each posting list is associated with a range of a number of consecutive values within the set of values, wherein the number of consecutive values is determined by dividing the number of values in the set of values by the number of positing lists, and wherein each posting list includes at least one of the document identifiers for at least one of the documents including at least one of the values within the range of consecutive values associated with the posting list; and performing at least one iteration of generating posting lists for an additional level, wherein each posting list generated for the additional level is formed by merging at least two posting lists associated with a previous level, wherein each generated posting list at one additional level is associated with consecutive values in the set of values, wherein each document in the generated posting list at the additional level includes one value in the consecutive values associated with the posting list at the additional level, and wherein a new additional level and posting lists associated therewith are generated with each iteration.
3. A computer implemented method, comprising: accessing document identifiers for documents; scanning the documents to determine values comprising searchable terms in the documents that are members of a set of values, wherein the set of values comprises at least one of an integer and a real number; generating a number of posting lists associated with a first level, wherein each posting list is associated with a range of a number of consecutive values within the set of values, wherein the number of consecutive values is determined by dividing the number of values in the set of values by the number of positing lists, and wherein each posting list includes at least one of the document identifiers for at least one of the documents including at least one of the values within the range of consecutive values associated with the posting list; and performing at least one iteration of generating posting lists for an additional level, wherein each posting list generated for the additional level is formed by merging at least two posting lists associated with a previous level, wherein each generated posting list at one additional level is associated with consecutive values in the set of values, wherein each document in the generated posting list at the additional level includes one value in the consecutive values associated with the posting list at the additional level, and wherein a new additional level and posting lists associated therewith are generated with each iteration. 9. The method of claim 3 , further comprising: filtering at least one of the determined posting lists at the first level in response to the determined posting lists at the first level including values outside of the query range of values to remove values not within the query range of values to form at least one filtered posting list only including values within the query range of values, wherein merging the determined posting lists comprises merging the at least one filtered posting list and determined posting lists that are not subject to filtering.