# E.6 Line Contains This filter is only "permeable" for lines that contain the expression given as parameter. For example, the following filterchain would only let all the lines pass that contain `class`: ``` <filterchain> <linecontains> <contains value="class" /> </linecontains> </filterchain> ``` Table E.6:聽 Attributes for the `<linecontains> `filter NameTypeDescriptionDefaultRequired`negate``Boolean`Whether to select non-matching lines only.falseNo E.6.1 Nested tags The `linecontains` tag must contain one or more `contains` tags. Latter must have a `value` attribute that has to be set to the string the line has to contain to be let through.