diff --git a/profiles/manufacturer.yaml b/profiles/manufacturer.yaml
index 7ab34a1..c4f3247 100644
--- a/profiles/manufacturer.yaml
+++ b/profiles/manufacturer.yaml
@@ -2,5 +2,9 @@ entity: product_manufacturer
 mappings:
   - file_column: "identifier"
     entity_path: "id"
-  - file_column: "name (default language)"
+  - file_column: "default name"
     entity_path: "name"
+  - file_column: "default description"
+    entity_path: "description"
+  - file_column: "website"
+    entity_path: "link"
diff --git a/profiles/product_required.yaml b/profiles/product_required.yaml
new file mode 100644
index 0000000..b3b8c5f
--- /dev/null
+++ b/profiles/product_required.yaml
@@ -0,0 +1,32 @@
+# Profile that contains all required fields for a product
+entity: product
+mappings:
+  - file_column: "id"
+    entity_path: "id"
+  - file_column: "product number"
+    entity_path: "productNumber"
+  - file_column: "default name"
+    entity_path: "name"
+  - file_column: "default price net"
+    key: "default_price_net"
+  - file_column: "default price gross"
+    key: "default_price_gross"
+  - file_column: "stock"
+    entity_path: "stock"
+  - file_column: "tax id"
+    entity_path: "taxId"
+serialize_script: |
+  // ToDo: add convenience function to lookup default currencyId
+  let price = entity.price.find(|p| p.currencyId == "b7d2554b0ce847cd82f3ac9bd1c0dfca");
+  row.default_price_net = price.net;
+  row.default_price_gross = price.gross;
+
+deserialize_script: |
+  entity.price = [
+    #{
+      net: row.default_price_net,
+      gross: row.default_price_gross,
+      linked: true,
+      currencyId: "b7d2554b0ce847cd82f3ac9bd1c0dfca",
+    }
+  ];
diff --git a/src/api.rs b/src/api.rs
index 92fc8eb..26a4648 100644
--- a/src/api.rs
+++ b/src/api.rs
@@ -36,7 +36,7 @@ impl SwClient {
         let entity: String = entity.into();
         let start_instant = Instant::now();
         println!(
-            "sync {:?} {} with payload size {}",
+            "sync {:?} '{}' with payload size {}",
             action,
             &entity,
             payload.len()
diff --git a/src/data/export.rs b/src/data/export.rs
index af6a445..6874e8d 100644
--- a/src/data/export.rs
+++ b/src/data/export.rs
@@ -11,7 +11,7 @@ pub async fn export(context: Arc<SyncContext>) -> anyhow::Result<()> {
     let mut page = 1;
     let mut counter = 0;
     println!(
-        "Reading {} of type {} with chunk limit {}",
+        "Reading {} of entity '{}' with chunk limit {}",
         total, context.schema.entity, chunk_limit
     );
 
diff --git a/src/data/import.rs b/src/data/import.rs
index d2fcab3..83671c0 100644
--- a/src/data/import.rs
+++ b/src/data/import.rs
@@ -42,7 +42,7 @@ pub async fn import(context: Arc<SyncContext>) -> anyhow::Result<()> {
                         let row_index = row_indices.remove(entry);
                         let row = chunk.remove(entry);
                         println!(
-                            "server validation error on row {}: {} Remaining pointer {} ignored payload:\n{}",
+                            "server validation error on row {}: {} Remaining pointer '{}' ignored payload:\n{}",
                             row_index + 2,
                             err.detail,
                             remaining_pointer,
@@ -63,88 +63,3 @@ pub async fn import(context: Arc<SyncContext>) -> anyhow::Result<()> {
 
     Ok(())
 }
-
-// old implementation below (was in main)
-/*
-let start_instant = Instant::now();
-let payload_size = std::env::args().nth(1).map_or(200usize, |s| {
-    s.parse()
-        .expect("invalid argument, provide a number for payload_size")
-});
-let credentials = tokio::fs::read_to_string("./.credentials.toml")
-    .await
-    .context("can't read ./.credentials.toml")?;
-let credentials: Credentials = toml::from_str(&credentials)?;
-let currency_id = "b7d2554b0ce847cd82f3ac9bd1c0dfca";
-
-let sw_client = SwClient::new(credentials).await?;
-let entity_schema = sw_client.entity_schema().await?;
-
-// todo move blocking call to separate thread
-let mut csv_reader = csv::ReaderBuilder::new()
-    .delimiter(b';')
-    .from_path("./data/10kProducts.csv")?;
-let headers = csv_reader.headers()?.clone();
-println!("CSV headers: {:?}", headers);
-
-let iter = csv_reader.records().map(|r| {
-    let result = r.unwrap();
-
-    let sync_product = json!({
-        "id": result[0],
-        "taxId": result[5],
-        "price": [
-            {
-                "currencyId": currency_id,
-                "net": result[1].parse::<f64>().unwrap(),
-                "gross": result[2].parse::<f64>().unwrap(),
-                "linked": false,
-            }
-        ],
-        "name": result[6],
-        "productNumber": result[3],
-        "stock": result[4].parse::<i32>().unwrap(),
-    });
-
-    sync_product
-});
-
-let mut join_handles = vec![];
-for sync_values in &iter.enumerate().chunks(payload_size) {
-    let (mut row_indices, mut chunk): (Vec<usize>, Vec<serde_json::Value>) =
-        sync_values.unzip();
-    let sw_client = sw_client.clone();
-    join_handles.push(tokio::spawn(async move {
-        match sw_client.sync("product", SyncAction::Upsert, &chunk).await {
-            Ok(()) => Ok(()),
-            Err(SwApiError::Server(_, body)) => {
-                for err in body.errors.iter().rev() {
-                    const PREFIX: &str = "/write_data/";
-                    let (entry_str , remaining_pointer)= &err.source.pointer[PREFIX.len()..].split_once('/').expect("error pointer");
-                    let entry: usize = entry_str.parse().expect("error pointer should contain usize");
-
-                    let row_index = row_indices.remove(entry);
-                    let row = chunk.remove(entry);
-                    println!(
-                        "server validation error on row {}: {} Remaining pointer {} ignored payload:\n{}",
-                        row_index + 2,
-                        err.detail,
-                        remaining_pointer,
-                        serde_json::to_string_pretty(&row)?,
-                    );
-                }
-                // retry
-                sw_client.sync("product", SyncAction::Upsert, &chunk).await
-            },
-            Err(e) => Err(e),
-        }
-    }));
-}
-
-for join_handle in join_handles {
-    join_handle.await??;
-}
-
-println!("Finished after {} ms", start_instant.elapsed().as_millis());
-Ok(())
- */
diff --git a/src/data/transform.rs b/src/data/transform.rs
index 7a8a0eb..def1c04 100644
--- a/src/data/transform.rs
+++ b/src/data/transform.rs
@@ -29,7 +29,7 @@ pub fn deserialize_row(
                 .iter()
                 .position(|h| h == mapping.file_column)
                 .context(format!(
-                    "Can't find column {} in CSV headers",
+                    "Can't find column '{}' in CSV headers",
                     mapping.file_column
                 ))?;
 
@@ -67,7 +67,7 @@ pub fn deserialize_row(
                     .iter()
                     .position(|header| header == path_mapping.file_column)
                     .context(format!(
-                        "Can't find column {} in CSV headers",
+                        "Can't find column '{}' in CSV headers",
                         path_mapping.file_column
                     ))?;
 
@@ -130,7 +130,7 @@ pub fn serialize_entity(
                 let value = match path_mapping.entity_path.as_ref() {
                     "id" => &serde_json::Value::String(entity.id.to_string()),
                     path => entity.attributes.get(path).context(format!(
-                        "could not get field path {} specified in mapping, entity attributes:\n{}",
+                        "could not get field path '{}' specified in mapping, entity attributes:\n{}",
                         path,
                         serde_json::to_string_pretty(&entity.attributes).unwrap()
                     ))?,
@@ -147,7 +147,7 @@ pub fn serialize_entity(
                 let value = script_row
                     .get(script_mapping.key.as_str())
                     .context(format!(
-                        "failed to retrieve script key {} of row",
+                        "failed to retrieve script key '{}' of row",
                         script_mapping.key
                     ))?;
                 let value_str = serde_json::to_string(value)?;
diff --git a/src/main.rs b/src/main.rs
index b18b79e..43836f1 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,7 +1,7 @@
 use crate::api::SwClient;
-use crate::config::{Credentials, Schema};
+use crate::config::{Credentials, Mapping, Schema};
 use crate::data::{export, import, prepare_scripting_environment, ScriptingEnvironment};
-use anyhow::Context;
+use anyhow::{anyhow, Context};
 use clap::{ArgAction, Parser, Subcommand};
 use std::path::PathBuf;
 use std::sync::Arc;
@@ -44,7 +44,7 @@ enum Commands {
 
         /// Path to input data file
         #[arg(short, long)]
-        input: PathBuf,
+        file: PathBuf,
 
         /// Maximum amount of entities, can be used for debugging
         #[arg(short, long)]
@@ -62,7 +62,7 @@ enum Commands {
 
         /// Path to output file
         #[arg(short, long)]
-        output: PathBuf,
+        file: PathBuf,
 
         /// Maximum amount of entities, can be used for debugging
         #[arg(short, long)]
@@ -97,21 +97,21 @@ async fn main() -> anyhow::Result<()> {
         }
         Commands::Import {
             schema,
-            input,
+            file,
             limit,
             verbose,
         } => {
-            let context = create_context(schema, input, limit, verbose).await?;
+            let context = create_context(schema, file, limit, verbose).await?;
             import(Arc::new(context)).await?;
             println!("Imported successfully");
         }
         Commands::Export {
             schema,
-            output,
+            file,
             limit,
             verbose,
         } => {
-            let context = create_context(schema, output, limit, verbose).await?;
+            let context = create_context(schema, file, limit, verbose).await?;
             export(Arc::new(context)).await?;
             println!("Exported successfully");
         }
@@ -159,7 +159,15 @@ async fn create_context(
         .await
         .context("No provided schema file not found")?;
     let schema: Schema = serde_yaml::from_str(&serialized_schema)?;
-    // ToDo: schema verification
+    for mapping in &schema.mappings {
+        if let Mapping::ByPath(by_path) = mapping {
+            if by_path.entity_path.contains('.') || by_path.entity_path.contains('/') {
+                return Err(anyhow!("entity_path currently only supports fields of the entity and no associations, but found '{}'", by_path.entity_path));
+            }
+        }
+    }
+
+    // ToDo: further schema verification
 
     // ToDo: create lookup table for languages + currencies?