diff --git a/URI_Replacement.Rproj b/URI_Replacement.Rproj
new file mode 100644
index 0000000..8e3c2eb
--- /dev/null
+++ b/URI_Replacement.Rproj
@@ -0,0 +1,13 @@
+Version: 1.0
+
+RestoreWorkspace: Default
+SaveWorkspace: Default
+AlwaysSaveHistory: Default
+
+EnableCodeIndexing: Yes
+UseSpacesForTab: Yes
+NumSpacesForTab: 2
+Encoding: UTF-8
+
+RnwWeave: Sweave
+LaTeX: pdfLaTeX
diff --git a/data/GC3D_Limits_ref.xlsx b/data/GC3D_Limits_ref.xlsx
new file mode 100644
index 0000000..9a7e5b6
Binary files /dev/null and b/data/GC3D_Limits_ref.xlsx differ
diff --git a/data/GC3D_Units_ref.xlsx b/data/GC3D_Units_ref.xlsx
new file mode 100644
index 0000000..d0cff0f
Binary files /dev/null and b/data/GC3D_Units_ref.xlsx differ
diff --git a/data/inDB-2021_09_01.xlsx b/data/inDB-2021_09_01.xlsx
new file mode 100644
index 0000000..818f8c8
Binary files /dev/null and b/data/inDB-2021_09_01.xlsx differ
diff --git a/find_and_replace_uri.R b/find_and_replace_uri.R
new file mode 100644
index 0000000..532e6b3
--- /dev/null
+++ b/find_and_replace_uri.R
@@ -0,0 +1,111 @@
+library("readxl")
+library("writexl")
+library("dplyr")
+library("xlsx")
+library("stringi")
+library("SPARQL")
+library("stringr")
+library("tictoc")
+
+source("../sparql.R")
+
+###### Konfiguration #########
+
+#Arbeitsverzeichnis
+setwd("C:/Users/linchr/ownCloud/GIT/URI_Replacement")
+
+#Funktionen einbinden
+source("sparql.R")
+
+#Datei in der ersetzt werden soll
+PFAD_EXCEL = "GC3D_Limits_ref.xlsx"
+
+#Spaltennummer in denen ersetzt werden soll im Excel
+SPALTEN = c(2,3,4,5,6)
+
+#Spaltennummer mit der verglichen wird aus Datenbank (citations)
+INHALTE_DB = 3
+
+#Spaltennummer der Inhalte die eingesetzt werden soll (uris)
+ID = 1
+
+##############################
+
+
+### Einlesen ###
+inDB = get_current_geoera_lit_db()
+
+to_replace_original = read_excel(PFAD_EXCEL)
+to_replace_done = to_replace_original
+
+###
+
+
+
+#Schleife über den Spaltenvektor aus der Excel
+for(spalte_excel in SPALTEN[1]:SPALTEN[length(SPALTEN)]){ 
+  
+  #Start der Zeitmessung für aktuelle Spalte
+  tic(paste("starte mit Spalte",spalte_excel))
+  
+  for (zeile_excel in 1:nrow(to_replace_original[,spalte_excel])) {
+    
+    current_excel = tolower(to_replace_original[zeile_excel,spalte_excel])
+    
+    if(is.na(current_excel)){
+      next
+    }
+    
+    if((nchar(current_excel) < 20)){
+      to_replace_done[zeile_excel, spalte_excel] = ""
+      next
+    }
+    
+    excel_search_all = unlist(strsplit(gsub("[^[:alnum:] ]", "", current_excel), " +"))
+    excel_search_numbers = str_extract_all(current_excel,"\\(?[0-9]+\\)?")
+    
+    for (zeile_db in 1:nrow(inDB[,INHALTE_DB])) {
+      
+      current_db = tolower(inDB[zeile_db,INHALTE_DB])
+      
+      db_search_all = unlist(strsplit(gsub("[^[:alnum:] ]", "", current_db), " +"))
+      db_search_numbers = str_extract_all(current_db,"\\(?[0-9]+\\)?")
+      
+      count_all = 0
+      count_numbers = 0
+      
+      for(k in 1:length(excel_search_all)){
+        if(excel_search_all[k] %in% db_search_all){
+          
+          count_all = count_all + 1
+        }
+      }
+      
+      for(l in 1:length(excel_search_numbers)){
+        if(excel_search_numbers[l] %in% db_search_numbers){
+          
+          count_numbers =+ count_numbers + 1
+        }
+      }
+      
+      percent_match_all = count_all/ length(excel_search_all)
+      percent_match_numbers = count_numbers/ length(excel_search_numbers)
+      
+      if((percent_match_all > 0.80) && (percent_match_numbers > 0.99)){
+        
+        
+        to_replace_done[zeile_excel, spalte_excel] = str_remove_all(inDB[zeile_db,ID],"[<>]")
+        
+      }
+      
+    }
+  }
+  toc()
+}
+
+toc()
+
+pfad_output = paste("replaced_",PFAD_EXCEL, sep="")
+
+write_xlsx(to_replace_done, pfad_output)
+
diff --git a/sparql.R b/sparql.R
index 21fb851..93c2c13 100644
--- a/sparql.R
+++ b/sparql.R
@@ -53,4 +53,6 @@ get_current_geoera_lit_db <- function() {
     get_current_geoera_lit_db()
   }
   
-}
\ No newline at end of file
+}
+
+#a change
\ No newline at end of file