Abstract: A computer-implemented method for mapping multiple source content schemas into a single target content schema. For each source schema to be mapped, a source class tree representing the source schema classes and a target class tree representing the target schema classes are provided for display to a user, input specifying one or more source properties within one or more source classes is received, one or more target properties within one or more target classes are determined for mapping to the source properties, and a schema map file including a mapping of the target properties to the source properties is generated. The source databases are determined. The schema map files are applied to generate information used for extracting the appropriate content from the source databases and for loading the extracted content into the target database.