|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||707/02 ; 707/01 ; 707/200|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 360 인용 특허 : 38|
In a data processing system, a mechanism identifies data items by substantially unique identifiers which depend on all of the data in the data items and only on the data in the data items. The system also determines whether a particular data item is present in the database by examining the identifiers of the plurality of data items.
[ What is claimed is:] [1.] In a data processing system, an apparatus comprising:identity means for determining, for any of a plurality of data items present in the system, a substantially unique identifier, the identifier being determined using and depending on all of the data in the data item and only the data in the data item, whereby two identical data items in the system will have the same identifier; andexistence means for determining whether a particular data item is present in the system, by examining the identifiers of the plurality of data item...