Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In certain areas like medical and clinical, data is digitalized text. Key value operation is less useful for the digitalized text. Semantic warehousing is base of digitalized text data using similar functions as Data warehousing (DW), such as ETL(Extract, transform, load), ODS(Operational data store), and MODEL. Semantic warehousing is different from DW in that semantic information base from text(semantic) data. Semantic warehousing is different from search engine in that semantic information base from text data stored in database.(DBMS). Though data is most important word in computing era, it can not explain human knowledge well yet. Data(numeric data) is key element of computing systems for certain organization (especially companies, enterprises), but no performance oriented organization needs something to gather and use knowledge or human feeling. Semantic warehousing will be equally or more important than data warehousing in the future.