diff --git a/bin/core/imag-ids/src/id_filters.rs b/bin/core/imag-ids/src/id_filters.rs
new file mode 100644
index 00000000..966d7589
--- /dev/null
+++ b/bin/core/imag-ids/src/id_filters.rs
@@ -0,0 +1,45 @@
+//
+// imag - the personal information management suite for the commandline
+// Copyright (C) 2015-2018 Matthias Beyer <mail@beyermatthias.de> and contributors
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; version
+// 2.1 of the License.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+//
+
+use filters::filter::Filter;
+
+use libimagstore::storeid::StoreId;
+
+pub struct IsInCollectionsFilter<'a, A>(Option<A>, ::std::marker::PhantomData<&'a str>)
+    where A: AsRef<[&'a str]>;
+
+impl<'a, A> IsInCollectionsFilter<'a, A>
+    where A: AsRef<[&'a str]>
+{
+    pub fn new(collections: Option<A>) -> Self {
+        IsInCollectionsFilter(collections, ::std::marker::PhantomData)
+    }
+}
+
+impl<'a, A> Filter<StoreId> for IsInCollectionsFilter<'a, A>
+    where A: AsRef<[&'a str]> + 'a
+{
+    fn filter(&self, sid: &StoreId) -> bool {
+        match self.0 {
+            Some(ref colls) => sid.is_in_collection(colls),
+            None => true,
+        }
+    }
+}
+
diff --git a/bin/core/imag-ids/src/main.rs b/bin/core/imag-ids/src/main.rs
index 240a03ea..2af2b4d3 100644
--- a/bin/core/imag-ids/src/main.rs
+++ b/bin/core/imag-ids/src/main.rs
@@ -48,25 +48,12 @@ use libimagerror::trace::MapErrTrace;
 use libimagerror::iter::TraceIterator;
 use libimagerror::exit::ExitUnwrap;
 use libimagerror::io::ToExitCode;
-use libimagstore::storeid::StoreId;
 
+mod id_filters;
 mod ui;
+
 use ui::build_ui;
-
-
-pub struct IsInCollectionsFilter<'a, A>(Option<A>, ::std::marker::PhantomData<&'a str>)
-    where A: AsRef<[&'a str]>;
-
-impl<'a, A> Filter<StoreId> for IsInCollectionsFilter<'a, A>
-    where A: AsRef<[&'a str]> + 'a
-{
-    fn filter(&self, sid: &StoreId) -> bool {
-        match self.0 {
-            Some(ref colls) => sid.is_in_collection(colls),
-            None => true,
-        }
-    }
-}
+use id_filters::IsInCollectionsFilter;
 
 fn main() {
     let version = make_imag_version!();
@@ -82,7 +69,7 @@ fn main() {
         .values_of("in-collection-filter")
         .map(|v| v.collect::<Vec<&str>>());
 
-    let collection_filter = IsInCollectionsFilter(values, ::std::marker::PhantomData);
+    let collection_filter = IsInCollectionsFilter::new(values);
 
     rt.store()
         .entries()