From b4d88c72bfa316a82578ef5e515801eae9b1085c Mon Sep 17 00:00:00 2001
From: Matthias Beyer <mail@beyermatthias.de>
Date: Thu, 4 Feb 2016 13:51:46 +0100
Subject: [PATCH 1/2] doc: Add section store/tagging

---
 doc/src/02020-tagging.md | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 doc/src/02020-tagging.md

diff --git a/doc/src/02020-tagging.md b/doc/src/02020-tagging.md
new file mode 100644
index 00000000..93fad092
--- /dev/null
+++ b/doc/src/02020-tagging.md
@@ -0,0 +1,13 @@
+## Tagging entries {#sec:thestore:tagging}
+
+A store entry MAY be tagged. A tag is a String which matches the
+regular expression in @lst:tagging:regex
+
+```{#lst:tagging:regex .numberLines caption="Regular Expression for Tags"}
+/^[a-zA-Z]([a-zA-Z0-9_-]*)$/
+```
+
+Tags MUST BE stored in the header section "imag" in the key "tags" as an Array
+of Strings.
+The tags MUST BE sorted in alphabetical order.
+

From c25f32fd85bcb3a21a8e50c63937891e4b26cf2a Mon Sep 17 00:00:00 2001
From: Matthias Beyer <mail@beyermatthias.de>
Date: Thu, 4 Feb 2016 13:51:55 +0100
Subject: [PATCH 2/2] Add chapter on libtag

---
 doc/src/04200-lib-tag.md | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 doc/src/04200-lib-tag.md

diff --git a/doc/src/04200-lib-tag.md b/doc/src/04200-lib-tag.md
new file mode 100644
index 00000000..20d2bd1c
--- /dev/null
+++ b/doc/src/04200-lib-tag.md
@@ -0,0 +1,18 @@
+# libtag {#sec:libtag}
+
+The "libtag" library contains functionality for tagging entries.
+
+The following functionality for entries is provided:
+
+* Adding a tag to an entry
+* Removing a tag from an entry
+* Fetching the list of tags from an entry
+* Checking whether a tag is set in an entry
+
+The following additional functionality is provided:
+
+* Fetching all entries which contain a tag
+* Fetching all entries which contain a list of tags
+* Fetching all entries which fulfill a set of tag-requirements (either
+  present, or not present, chained by logical operators)
+