Unverified50% confidenceFactExact time
E.F. Codd 于1970年提出关系模型，并于1993年撰文批评当时OLAP工具对多维语义的滥用，发布了「Codd 12条OLAP规则」
1
Sources
50%
Confidence
Long-term
Relevance
7/19/2026
First Seen
Sources
Apache Ossie：打破语义孤岛的开放元数据交换标准
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