Returns whether the string starts with the specified search text.
bool STARTSWITH(string searchText, string value)
In this example we keep track of items that have been stock checked by adding "Valid_" to the start of the ProductName. We want to see if the products in our list have all been stock checked:
STARTSWITH("Valid_", ProductName)
This will return true
for all ProductName's that have "Valid_" at the start and false
for those that do not.