add ISBN relaton/relaton-isbn#1

_cite_docs/isbn.adoc

@@ -0,0 +1,27 @@
+---
+title: Citation guide for ISBN publications
+flavor: ISBN
+description: Cite ISBN publications
+layout: cite-doc
+---
+
+== Citing ISBN publications
+
+=== Prefix
+
+The prefix for ISBN publications is `ISBN`
+
+[example]
+`ISBN 978-0-12-064481-0`
+
+=== Number format
+
+ISBN number canb ISBN-10 or ISBN-13. Hyphens are optional.
+
+[example]
+[sources]
+----
+ISBN 978-0-12-064481-0
+ISBN 9780120644810
+ISBN 0120644819
+----

_cite_docs/jis.adoc

@@ -32,5 +32,8 @@ In case of multi-part standards, the part number is specified after the number o
 To cite all parts of a standard, adding space and `(all parts)` option after the number of the standard:
 
 [example]
-`JIS B 0060 (all parts)`
-`JIS B 0060 (規格群)`
+[source]
+----
+JIS B 0060 (all parts)
+JIS B 0060 (規格群)
+----

_config.yml

@@ -181,6 +181,12 @@ relaton:
       gem: relaton-doi
       sources:
         - { url: "https://www.crossref.org/documentation/retrieve-metadata/rest-api/", label: "Digital Object Identifier" }
+    - id: isbn
+      label: ISBN
+      citation_guide: true
+      gem: relaton-isbn
+      sources:
+        - { url: "http://openlibrary.org", label: "Open Library" }
 
 author:
   name: Ribose Inc.

_software/relaton-isbn.adoc

@@ -0,0 +1,15 @@
+---
+title: RelatonIsbn
+description: Retrieves ISBN publications for bibliographic use using the BibliographicItem model.
+repo_url: https://github.com/relaton/relaton-isbn
+
+external_links:
+  - url: https://github.com/relaton/relaton-isbn
+
+tags: ["writtenin:Ruby", "user:ISBN"]
+
+feature_with_priority: 2
+---
+
+You can use it to retrieve metadata of ISBN publications from http://openlibrary.org
+and access that metadata through the `BibliographicItem` object.