One significant semantic difference is that the use of a single forward-slash ( Following are syntax and semantic descriptions for news window commands which will select a new current category. These descriptions assume the command text is being entered into an existing news window. If a particular setting is not explicitly shown to receive a new value, then its value remains unchanged. Select a new category and a new search query: category current_category category previous_query current_query current_query search_query Select a new category, preserving and re-applying the existing current query: category Select a new category, recalling the previous query to be the new current query: category previous_query current_query Select a new category, appending a new query element to the existing current query to form the new current query: category current_category category previous_query current_query current_query category current_category category current_query (previous_query) operator new_element Note 2: Parentheses are placed around the original previous query value unless the given operator serves to extend a chained query element in the original previous query. For example, if the original previous query was a & b & c and the new operator and element were & d, the new value for the current query setting would be a & b & c & d, not (a & b & c) & d.Combining Category Selection and Search Query Entry
When selecting a new current category, it is also possible to preserve the original current query or to define a new current query at the same time. This is done by appending a search query command to the end of a category specification.
Select a new category, appending a new query element to the existing previous query to form the new current query: