diff --git a/Makefile b/Makefile
index a420905..9af0101 100644
--- a/Makefile
+++ b/Makefile
@@ -1,17 +1,17 @@
 data/corpus-simple-pascal.json: data/corpus-simple-teeft-en.json
-	npx ezs -e enrich-pascal.ini
+	npx ezs enrich-pascal.ini < data/corpus-simple-teeft-en.json > data/corpus-simple-pascal.json
 
 data/corpus-simple-teeft-en.json: data/corpus-simple-instituts.json
-	npx ezs -e enrich-teeft-en.ini
+	npx ezs enrich-teeft-en.ini < data/corpus-simple-instituts.json > data/corpus-simple-teeft-en.json
 
 data/corpus-simple-instituts.json: data/corpus-simple-etab.json
-	npx ezs -e enrich-institutes.ini
+	npx ezs enrich-institutes.ini < data/corpus-simple-etab.json > data/corpus-simple-instituts.json
 
 data/corpus-simple-etab.json: data/corpus-simple-rnsr.json
-	npx ezs -e enrich-etab.ini
+	npx ezs enrich-etab.ini < data/corpus-simple-rnsr.json > data/corpus-simple-etab.json
 
 data/corpus-simple-rnsr.json: data/corpus-simple.json
-	npx ezs -e enrich-rnsr.ini
+	npx ezs enrich-rnsr.ini < data/corpus-simple.json > data/corpus-simple-rnsr.json
 
 data/corpus-simple.json: corpus_WoS_vol1.json
-	npx ezs -e extract-fields.ini
+	npx ezs extract-fields.ini < corpus_WoS_vol1.json > data/corpus-simple.json
diff --git a/enrich-etab.ini b/enrich-etab.ini
index f8f61f8..a99295e 100644
--- a/enrich-etab.ini
+++ b/enrich-etab.ini
@@ -1,22 +1,13 @@
-# Usage: npx ezs -e enrich-etab.ini
+# Usage: npx ezs enrich-etab.ini < data/corpus-simple-rnsr.json > data/corpus-simple-etab.json
 
 # To see the enriched notices:
 # $ fx < data/corpus-simple-etab.json '.filter(o => o.ws.rnsr[0]?.length)'
 
 
 [use]
-# JSONParse FILELoad FILESave
+# JSONParse
 plugin = basics
 
-# read data
-[exchange]
-value = [ "corpus-simple-rnsr.json" ]
-
-[JSONParse]
-
-[FILELoad]
-location = data
-
 [JSONParse]
 
 # Concaténation des sigles et libellés des établissements associés
@@ -24,13 +15,5 @@
 path = ws.etab
 value = get('ws.rnsr', []).map(structs => Array.isArray(structs) ? structs.map(struct => `${struct.sigle}: ${struct.intitule}`) : []).flatten()
 
-# Save data
-[dump]
-indent = true
-
-[FILESave]
-location = data
-identifier = corpus-simple-etab.json
-
 [dump]
 indent = true
diff --git a/enrich-institutes.ini b/enrich-institutes.ini
index bc463f8..e5307be 100644
--- a/enrich-institutes.ini
+++ b/enrich-institutes.ini
@@ -1,26 +1,18 @@
-# Usage: npx ezs -e enrich-institutes.ini
+# Usage: npx ezs enrich-institutes.ini < data/corpus-simple-etab.json > data/corpus-simple-instituts.json
 
 # To see the enriched notices:
 # $ fx < data/corpus-simple-instituts.json '.filter(o => o.ws.rnsr[0]?.length)'
 
 
 [use]
-# JSONParse URLConnect FILELoad FILESave
+# JSONParse URLConnect
 plugin = basics
-# expand
+# expand aggregate exploding
 plugin = analytics
 
-[exchange]
-value = [ "corpus-simple-etab.json" ]
-
 [JSONParse]
 
-[FILELoad]
-location = data
-
-[JSONParse]
-
-#2 - Instituts du CNRS
+# - Instituts du CNRS
 
 [assign]
 path = ws.rnsr_id
@@ -54,10 +46,3 @@
 
 [dump]
 indent = true
-
-[FILESave]
-location = data
-identifier = corpus-simple-instituts.json
-
-[dump]
-indent = true
diff --git a/enrich-pascal.ini b/enrich-pascal.ini
index 63ed0e2..1fa07ff 100644
--- a/enrich-pascal.ini
+++ b/enrich-pascal.ini
@@ -1,23 +1,16 @@
-# Usage: npx ezs -e enrich-pascal.ini
+# Usage: npx ezs enrich-pascal.ini < data/corpus-simple-teeft-en.json > data/corpus-simple-pascal.json
+
 
 # To see the enriched notices:
 # $ fx < data/corpus-simple-pascal.json '.filter(o => o.ws.rnsr[0]?.length)'
 
 
 [use]
-# JSONParse URLConnect FILELoad FILESave
+# JSONParse URLConnect
 plugin = basics
 # expand
 plugin = analytics
 
-[exchange]
-value = [ "corpus-simple-teeft-en.json" ]
-
-[JSONParse]
-
-[FILELoad]
-location = data
-
 [JSONParse]
 
 # - Pascal
@@ -29,7 +22,6 @@
 
 [expand]
 path = ws.pascal
-# WARNING: using the line below sometimes leads to unexpected results
 size = 100
 
 [expand/URLConnect]
@@ -40,10 +32,3 @@
 
 [dump]
 indent = true
-
-[FILESave]
-location = data
-identifier = corpus-simple-pascal.json
-
-[dump]
-indent = true
diff --git a/enrich-rnsr.ini b/enrich-rnsr.ini
index 177e8f2..2491f9e 100644
--- a/enrich-rnsr.ini
+++ b/enrich-rnsr.ini
@@ -1,25 +1,17 @@
-# Usage: npx ezs -e enrich-rnsr.ini
+# Usage: npx ezs enrich-rnsr.ini < data/corpus-simple.json > data/corpus-simple-rnsr.json
 
 # To see the enriched notices:
 # $ fx < data/corpus-simple-rnsr.json '.filter(o => o.ws.rnsr[0]?.length)'
 
 [use]
-# JSONParse URLConnect FILELoad FILESave
+# JSONParse URLConnect
 plugin = basics
-# expand
+# expand aggregate exploding
 plugin = analytics
 
-[exchange]
-value = [ "corpus-simple.json" ]
-
 [JSONParse]
 
-[FILELoad]
-location = data
-
-[JSONParse]
-
-#1 - Informations RNSR
+# - Informations RNSR
 
 [assign]
 path = ws.rnsr
@@ -45,10 +37,3 @@
 
 [dump]
 indent = true
-
-[FILESave]
-location = data
-identifier = corpus-simple-rnsr.json
-
-[dump]
-indent = true
diff --git a/enrich-teeft-en.ini b/enrich-teeft-en.ini
index 8118e71..4e88690 100644
--- a/enrich-teeft-en.ini
+++ b/enrich-teeft-en.ini
@@ -1,26 +1,18 @@
-# Usage: npx ezs -e enrich-teeft-en.ini
+# Usage: npx ezs enrich-teeft-en.ini < data/corpus-simple-instituts.json > data/corpus-simple-teeft-en.json
 
 # To see the enriched notices:
 # $ fx < data/corpus-simple-teeft-en.json '.filter(o => o.ws.rnsr[0]?.length)'
 
 
 [use]
-# JSONParse URLConnect FILELoad FILESave
+# JSONParse URLConnect
 plugin = basics
 # expand
 plugin = analytics
 
-[exchange]
-value = [ "corpus-simple-instituts.json" ]
-
 [JSONParse]
 
-[FILELoad]
-location = data
-
-[JSONParse]
-
-#2 - Teeft
+# - Teeft
 
 
 [assign]
@@ -29,7 +21,6 @@
 
 [expand]
 path = ws.teeft
-# WARNING: using the line below sometimes leads to unexpected results
 size = 100
 
 [expand/URLConnect]
@@ -40,10 +31,3 @@
 
 [dump]
 indent = true
-
-[FILESave]
-location = data
-identifier = corpus-simple-teeft-en.json
-
-[dump]
-indent = true
diff --git a/extract-fields.ini b/extract-fields.ini
index 730220e..90c9569 100644
--- a/extract-fields.ini
+++ b/extract-fields.ini
@@ -1,18 +1,10 @@
-# Take a WoS file in the data directory and extract few fields.
+# Extract few fields from a WoS file.
 # Usage:
-# npx ezs -e extract-fields.ini | jq
+# npx ezs extract-fields.ini < corpus_WoS_vol1.json | jq
 
 [use]
 plugin = basics
 
-[exchange]
-value = [ "corpus_WoS_vol1.json" ]
-
-[JSONParse]
-
-[FILELoad]
-location = .
-
 [JSONParse]
 
 [assign]
@@ -58,10 +50,3 @@
 
 [dump]
 indent = true
-
-[FILESave]
-location = data
-identifier = corpus-simple.json
-
-[dump]
-indent = true
\ No newline at end of file