"举个例子，请用OR mapping的工具实现人类家族谱的数据模型，我只要求可以实现上下查到祖孙3代，以及直系、旁系3代。" 感觉quanta说得太绝对, 似乎只有cache才能做到. 有兴趣的朋友,可以访问下面的link:
http://www.hci.utah.edu/groups/ppr/index.html
UPDB最深实现了跨越九个代系的DATA REPRESENTATION, 并且有多篇在TOP专业杂志发表的文章是通过对UPDB进行 DATA MINING所得的数据进行科学统计与分析产生的.
顺便提一下, UPDA 是基于SYBASE, 目前正向SQL SERVER CONVERTING...
The Utah Population Database (UPDB) is a rich source of information for genetic, epidemiological, demographic and public health studies. For 30 years, researchers have used this resource to identify and study families that have higher than normal incidence of cancer or other diseases, to analyze patterns of genetic inheritance and to identify specific genetic mutations. Demographic studies have observed and analyzed the trends in the fertility transition and changes in mortality patterns for both infants and adults.
The UPDB is the only such database of its kind in the US and one of few such resources in the world. The central component of UPDB is an extensive set of Utah family histories, in which family members are linked to demographic and medical information. The UPDB also includes diagnostic records on cancer, cause of death, and medical details associated with births. The UPDB provides access to almost 9 million records and supports over 55 research projects. These data can only be used for biomedical and health related research.
好久没来，这个帖子还挺热闹嘛，quanta没有研究过o/r mapping的工具，就不要武断的下结论，你去研究一下后再回来说，建议你就看hibernate，别的o/r工具你就不要看了，看它能做到什么程度！
