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spec: The optional constraint clauses specify constraints or tests which new or updated entries must satisfy for an insert or update operation to succeed . The X-ray spectra of YSOs are generally consistent with optically thin thermal plasma of temperature ranging from 1 keV to a few keV , with the 6.7 keV line of He-like irons present in some cases . The software was designed to calculate the wind speed at which components of a building will fail during a high wind storm . The probable reason for the prediction error is clay particles entering the CWs as aggregates . This has led to the emergence of organizational models such as business webs , virtual enterprises , or business services provisioning ( BSP ) . FHWA emergency relief money is awarded after the President or Governor has issued a formal emergency proclamation , and the state has filed a preliminary damage assessment for its highways and bridges on the federal-aid system . column_constraint_clause The optional column constraint clauses specify a list of integrity constraints or tests which new or updated entries must satisfy for an insert or update operation to succeed . Seven computer terminals accessing the archive replaced file drawers in the cabinets . Results of this research can be utilized to proactively schedule what maintenance task to perform on which machine in a way that is the least intrusive with the overall production or service process and therefore most cost-effective from the system point of view . The United Nations is hosting the forum . SDF allows the simultaneous definition of concrete ( i.e ., lexical and context-free ) and abstract syntax and implicitly defines a translation from text strings to abstract syntax trees . Key technical challenges in this work include building a system that can scale to the large number of expected data sources and users , and handling the failures inherent in mobile computing applications . She came up with an electronic invoice submittal method that should reduce the time it takes to pay invoices by about half and save about 75 percent in invoice processing costs once implementation is complete . table_constraint_clause The optional table CONSTRAINT clause specifies a list of integrity constraints which new or updated entries must satisfy for an insert or update operation to succeed . But the same reason why they needed the system - their vulnerability and lack of power - was also why they could do little to save it on their own .