diff --git a/lib/domain/libimaglog/Cargo.toml b/lib/domain/libimaglog/Cargo.toml
index 6ea77d62..9c825299 100644
--- a/lib/domain/libimaglog/Cargo.toml
+++ b/lib/domain/libimaglog/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "libimaglog"
-version = "0.5.0"
+version = "0.6.0"
 authors = ["Matthias Beyer <mail@beyermatthias.de>"]
 
 description = "Library for the imag core distribution"
@@ -24,6 +24,6 @@ toml = "0.4"
 toml-query = "0.3"
 error-chain = "0.11"
 
-libimagstore = { version = "0.5.0", path = "../../../lib/core/libimagstore" }
-libimagerror = { version = "0.5.0", path = "../../../lib/core/libimagerror" }
-libimagdiary = { version = "0.5.0", path = "../../../lib/domain/libimagdiary" }
+libimagstore = { version = "0.6.0", path = "../../../lib/core/libimagstore" }
+libimagerror = { version = "0.6.0", path = "../../../lib/core/libimagerror" }
+libimagdiary = { version = "0.6.0", path = "../../../lib/domain/libimagdiary" }
diff --git a/lib/domain/libimaglog/src/error.rs b/lib/domain/libimaglog/src/error.rs
new file mode 100644
index 00000000..2d00180f
--- /dev/null
+++ b/lib/domain/libimaglog/src/error.rs
@@ -0,0 +1,36 @@
+//
+// imag - the personal information management suite for the commandline
+// Copyright (C) 2015, 2016 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
+//
+
+error_chain! {
+    types {
+        LogError, LogErrorKind, ResultExt, Result;
+    }
+
+    foreign_links {
+        TomlQueryError(::toml_query::error::Error);
+    }
+
+    errors {
+        HeaderTypeError(expected: &'static str, got: &'static str) {
+            description("Header Type Error")
+            display("Error: Expected {} in header, got {}", expected, got)
+        }
+    }
+}
+
diff --git a/lib/domain/libimaglog/src/lib.rs b/lib/domain/libimaglog/src/lib.rs
index cdfbe1aa..375d6572 100644
--- a/lib/domain/libimaglog/src/lib.rs
+++ b/lib/domain/libimaglog/src/lib.rs
@@ -1,6 +1,30 @@
-#[cfg(test)]
-mod tests {
-    #[test]
-    fn it_works() {
-    }
-}
+//
+// imag - the personal information management suite for the commandline
+// Copyright (C) 2015, 2016 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
+//
+
+#[macro_use]
+extern crate error_chain;
+extern crate toml;
+extern crate toml_query;
+
+extern crate libimagdiary;
+extern crate libimagstore;
+
+pub mod error;
+pub mod log;
+
diff --git a/lib/domain/libimaglog/src/log.rs b/lib/domain/libimaglog/src/log.rs
new file mode 100644
index 00000000..a172eae4
--- /dev/null
+++ b/lib/domain/libimaglog/src/log.rs
@@ -0,0 +1,54 @@
+//
+// imag - the personal information management suite for the commandline
+// Copyright (C) 2015, 2016 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 libimagdiary::entry::DiaryEntry;
+use libimagstore::store::Entry;
+
+use error::LogError as LE;
+use error::LogErrorKind as LEK;
+use error::Result;
+
+use toml::Value;
+use toml_query::read::TomlValueReadExt;
+use toml_query::insert::TomlValueInsertExt;
+
+pub trait Log : DiaryEntry {
+    fn is_log(&self) -> Result<bool>;
+    fn make_log_entry(&mut self) -> Result<()>;
+}
+
+impl Log for Entry {
+    fn is_log(&self) -> Result<bool> {
+        let location = "log.is_log";
+        match self.get_header().read(location)? {
+            Some(&Value::Boolean(b)) => Ok(b),
+            Some(_) => Err(LE::from_kind(LEK::HeaderTypeError("boolean", location))),
+            None    => Ok(false)
+        }
+    }
+
+    fn make_log_entry(&mut self) -> Result<()> {
+        self.get_header_mut()
+            .insert("log.is_log", Value::Boolean(true))
+            .map_err(LE::from)
+            .map(|_| ())
+    }
+
+}
+