You can find out when most of the Mersch families immigrated to the United States. You can focus your search to immigration records dating from that era. Immigration records can tell you an ancestor's name, ship name, port of departure, port of arrival and destination.
What is a System Requirements Specification (SRS)? A System Requirements Specification (SRS) (also known as a Software Requirements Specification) is a document or set of documentation that describes the features and behavior of a system or software application.
Semantic difference express application requirements, for example the issue of whether metadata about contained objects should be in the container or the object; this is an application requirement because its utility depends on the level of trust in the metadata, which varies from one usecase to another.