diff --git a/biblio-tools/v1/crossref/expand.ini b/biblio-tools/v1/crossref/expand.ini
deleted file mode 100644
index b6d1d2d..0000000
--- a/biblio-tools/v1/crossref/expand.ini
+++ /dev/null
@@ -1,45 +0,0 @@
-# Necessary plugins
-[use]
-plugin = basics
-plugin = analytics
-plugin = storage
-
-# Flow configuration
-[JSONParse]
-separator = *
-
-[bufferize]
-
-[combine]
-path = env('path', 'value')
-primer = get('bufferID')
-prepend = buffers
-append = transit
-persistent = true
-
-[combine/exchange]
-value = get('value')
-
-[combine/group]
-size = 100
-
-[combine/replace]
-path = rows
-value = fix(self.length)
-path = filter
-value = self().map(x => 'doi:'.concat(x)).join(',')
-
-# see https://github.com/CrossRef/rest-api-doc#api-overview
-[combine/URLStream]
-url  = https://api.crossref.org/works
-path = .items.*
-timeout = 30000
-
-[combine/replace]
-path = id
-value = get('DOI')
-path = value
-value = self()
-
-[dump]
-indent = env('indent', false)
diff --git a/biblio-tools/v1/crossref/prefixes/README.md b/biblio-tools/v1/crossref/prefixes/README.md
new file mode 100644
index 0000000..fd80c11
--- /dev/null
+++ b/biblio-tools/v1/crossref/prefixes/README.md
@@ -0,0 +1,9 @@
+## To Test
+```
+cat <<EOF |jq .|curl -N --proxy "" -X POST --data-binary @- "http://localhost:31976/expand?indent=true"
+[
+	 { "value": "10.3998"},
+     { "value": "10.1037"}
+]
+EOF
+```
diff --git a/biblio-tools/v1/crossref/prefixes/expand.ini b/biblio-tools/v1/crossref/prefixes/expand.ini
new file mode 100644
index 0000000..fbe2ec6
--- /dev/null
+++ b/biblio-tools/v1/crossref/prefixes/expand.ini
@@ -0,0 +1,34 @@
+# Necessary plugins
+[use]
+plugin = basics
+plugin = analytics
+
+# Flow configuration
+[JSONParse]
+separator = *
+
+[expand]
+path = value
+size = 1
+cacheName = prefixes
+
+[expand/assign]
+path = url
+value = fix('https://api.crossref.org/prefixes', self.value).join('/')
+
+[expand/URLFetch]
+target = result
+url = get('url')
+json = true
+timeout = 30000
+noerror = true
+
+[expand/replace]
+path = id
+value = get('id')
+
+path = value
+value = get('result.message.name', 'n/a')
+
+[dump]
+indent = env('indent', false)
diff --git a/biblio-tools/v1/crossref/works/expand.ini b/biblio-tools/v1/crossref/works/expand.ini
new file mode 100644
index 0000000..b6d1d2d
--- /dev/null
+++ b/biblio-tools/v1/crossref/works/expand.ini
@@ -0,0 +1,45 @@
+# Necessary plugins
+[use]
+plugin = basics
+plugin = analytics
+plugin = storage
+
+# Flow configuration
+[JSONParse]
+separator = *
+
+[bufferize]
+
+[combine]
+path = env('path', 'value')
+primer = get('bufferID')
+prepend = buffers
+append = transit
+persistent = true
+
+[combine/exchange]
+value = get('value')
+
+[combine/group]
+size = 100
+
+[combine/replace]
+path = rows
+value = fix(self.length)
+path = filter
+value = self().map(x => 'doi:'.concat(x)).join(',')
+
+# see https://github.com/CrossRef/rest-api-doc#api-overview
+[combine/URLStream]
+url  = https://api.crossref.org/works
+path = .items.*
+timeout = 30000
+
+[combine/replace]
+path = id
+value = get('DOI')
+path = value
+value = self()
+
+[dump]
+indent = env('indent', false)