Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.

Conceptually, a database consists of objects and relationships. Object Relationship Notation (ORN) is a simple notation that more precisely defines relationships by combining UML multiplicities with uniquely defined referential actions.

Object Relationship Notation (ORN) for Database Applications: Enhancing the Modeling and Implementation of Associations shows how ORN can be used in UML class diagrams & database definition languages (DDLs) to better model & implement relationships & thus more productively develop database applications. For the database developer, it presents many examples of relationships modeled using ORN-extended class diagrams & shows how these relationships are easily mapped to an ORN-extended SQL or Object DDL. For the DBMS developer, it presents the specifications & algorithms needed to implement ORN in a relational and object DBMS.

This book also describes tools that can be downloaded or accessed via the Web. These tools allow databases to be modeled using ORN and implemented using automatic code generation that adds ORN support to Microsoft SQL Server and Progress Object Store.

WPA Technical Series: Research and Records Bibliography No. 7; Revised April 1943. This work was originally prepared by the Work Projects Administration (formerly the Works Progress Administration), and entitled "WPA Research and Records Bibliography No. 4," dated September 12, 1940, and "Research and Records Bibliography No. 4, revised," issued September 1, 1941. With this printing, the publication was reissued with the title "Bibliography of Research Projects Reports: Check List of Historical Records Survey Publications, revised April 1943," which better reflects the content of the book. This is the final listing of "Historical Records Survey" publications issued between 1936 and 1943, which were prepared under various names and several related federal programs. Included in these publications are transcriptions of state, county, town and municipal records, taken from the various archives that provide detailed information accumulated by each governing body and that depict important and relevant historical data to the genealogist and historian. Many of the records transcribed included minutes of meetings, matters taken before the court, and the work product of various commissions and boards. Also of vital interest to researchers are listings of what reports or publications are available for the various states, counties, and municipalities, and, more importantly, where those publications are located.

Palenque is one of the best known and oldest Mayan archaeological sites. But recently little has been published on the ongoing work here. Marken's collection brings the archaeological record of Palenque up to date. Chapters cover a wide range of topics from architecture to hieroglyphic texts, from broad issues of chronology to settlement to theoretical and methodological issues concerning architectural excavations. Palenque represents an important update of research for any Mayan archaeologist.