EXHIBIT: 99.1 PURCHASE AGREEMENT This PURCHASE AGREEMENT (this "Agreement"), dated as of November 6, 2001, is entered into by and between THE VIALINK COMPANY, a Delaware corporation (the "Company"), and SDS MERCHANT FUND, L.P., a Delaware limited...Purchase Agreement • November 7th, 2001 • Vialink Co • Services-computer programming services • New York
