The suit charges Oracle with infringing on 11 of i2's patents. I2 is seeking monetary damages and royalty payments, or else an injunction to block the alleged infringement.

The suit doesn't say which Oracle products are alleged to misuse i2's technology. Oracle sells several lines of supply chain management software, including products it inherited when it bought J.D. Edwards and PeopleSoft.

The suit was filed in the U.S. District Court for the Eastern District of Texas, which is seen as a friendly venue to patent plaintiffs.

Oracle declined to comment on the suit and spokespeople for i2 couldn't immediately be reached.

I2 has been something of a survivor in the software market. Founded in 1998, it survived the dot-com collapse and a subsequent period in which many ISVs were acquired or went out of business.