diff --git a/e2e/examples/http.rs b/e2e/examples/http.rs
index 0412ea1..81cba0b 100644
--- a/e2e/examples/http.rs
+++ b/e2e/examples/http.rs
@@ -55,7 +55,7 @@ async fn post_job(State(storage): State<JobStorage>, Json(input): Json<JobInput>
     Json(job_result)
 }
 
-#[instrument(skip_all, fields(work_id = %id))]
+#[instrument(skip_all, fields(id = %id))]
 async fn get_job(
     State(storage): State<JobStorage>,
     axum::extract::Path(id): axum::extract::Path<usize>,
diff --git a/explore/data.ipynb b/explore/data.ipynb
index d5b75d1..90fae4e 100644
--- a/explore/data.ipynb
+++ b/explore/data.ipynb
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:478490fc92ccede8cd988d216d342ba38ddaf5ff2d36a5f154edbf1e7c7837c3
-size 123113
+oid sha256:8dccb4cca3fe901125475162676b35634b2c8f927477d03b290171be2aa17c4b
+size 123079
diff --git a/past/src/bpf/past.bpf.c b/past/src/bpf/past.bpf.c
index 068b9c7..ac225f6 100644
--- a/past/src/bpf/past.bpf.c
+++ b/past/src/bpf/past.bpf.c
@@ -380,7 +380,7 @@ int handle__sched_process_exec(u64 *ctx)
 }
 
 SEC("usdt")
-int BPF_USDT(past_tracing_enter, u64 span_id, u64 parent_span_id, u64 work_id, u64 amount, void *name)
+int BPF_USDT(past_tracing_enter, u64 span_id, u64 parent_span_id, u64 id, u64 amount, void *name)
 {
     u64 __pid_tgid = bpf_get_current_pid_tgid();
     gid_t tgid = __pid_tgid >> 32;
@@ -401,7 +401,7 @@ int BPF_USDT(past_tracing_enter, u64 span_id, u64 parent_span_id, u64 work_id, u
     event->pid = pid;
     event->span_id = span_id;
     event->parent_id = parent_span_id;
-    event->work_id = work_id;
+    event->id = id;
     event->amount = amount;
     bpf_probe_read_user_str(&event->name, sizeof(event->name), name);
     bpf_ringbuf_submit(event, BPF_RB_NO_WAKEUP);
diff --git a/past/src/bpf/past.h b/past/src/bpf/past.h
index 8fd2eb5..acfc7ce 100644
--- a/past/src/bpf/past.h
+++ b/past/src/bpf/past.h
@@ -68,7 +68,7 @@ struct tracing_enter_event {
     __u32 pid;
     __u64 span_id;
     __u64 parent_id;
-    __u64 work_id;
+    __u64 id;
     __u64 amount;
     __u8 name[TASK_COMM_LEN];
 };
diff --git a/past/src/collector.rs b/past/src/collector.rs
index 3104449..2bbb6b5 100644
--- a/past/src/collector.rs
+++ b/past/src/collector.rs
@@ -68,7 +68,7 @@ impl<'a> From<&'a [u8]> for Received<'a> {
 #[derive(Debug)]
 struct SpanEnter {
     parent_id: u64,
-    work_id: u64,
+    id: u64,
     amount: u64,
     name: Bytes,
     first_enter_ts: u64,
@@ -160,7 +160,7 @@ impl Collector {
                     btree_map::Entry::Vacant(vacant) => {
                         vacant.insert(SpanEnter {
                             parent_id: event.parent_id,
-                            work_id: event.work_id,
+                            id: event.id,
                             amount: event.amount,
                             name: Bytes::copy_from_slice(null_terminated(&event.name)),
                             first_enter_ts: event.ts,
@@ -198,7 +198,7 @@ impl Collector {
                     command: command.clone(),
                     span_id: event.span_id as i64,
                     parent_id: span.parent_id as i64,
-                    work_id: span.work_id as i64,
+                    id: span.id as i64,
                     amount: span.amount as i64,
                     name: span.name.clone(),
                     ustack: event.ustack,
@@ -232,7 +232,7 @@ impl Collector {
                             command: command.clone(),
                             span_id: event.span_id as i64,
                             parent_id: span.parent_id as i64,
-                            work_id: span.work_id as i64,
+                            id: span.id as i64,
                             amount: span.amount as i64,
                             name: span.name.clone(),
                         });
diff --git a/past/src/parquet.rs b/past/src/parquet.rs
index 12cb254..822493c 100644
--- a/past/src/parquet.rs
+++ b/past/src/parquet.rs
@@ -61,7 +61,7 @@ fn events_schema() -> types::Type {
         required int32 pid (INTEGER(32, false));
         required int64 span_id (INTEGER(64, false));
         required int64 parent_id (INTEGER(64, false));
-        required int64 work_id (INTEGER(64, false));
+        required int64 id (INTEGER(64, false));
         required int64 amount (INTEGER(64, false));
         required binary command (UTF8);
         required binary trace_name (UTF8);
@@ -110,7 +110,7 @@ pub(crate) enum Event {
         pid: i32,
         span_id: i64,
         parent_id: i64,
-        work_id: i64,
+        id: i64,
         amount: i64,
         name: Bytes,
         command: Bytes,
@@ -124,7 +124,7 @@ pub(crate) enum Event {
         pid: i32,
         span_id: i64,
         parent_id: i64,
-        work_id: i64,
+        id: i64,
         amount: i64,
         name: Bytes,
         command: Bytes,
@@ -145,7 +145,7 @@ pub(crate) struct Group {
     pid: Vec<i32>,
     span_id: Vec<i64>,
     parent_id: Vec<i64>,
-    work_id: Vec<i64>,
+    id: Vec<i64>,
     amount: Vec<i64>,
     command: Vec<ByteArray>,
     trace_name: Vec<ByteArray>,
@@ -171,7 +171,7 @@ impl Group {
             pid: Vec::with_capacity(capacity),
             span_id: Vec::with_capacity(capacity),
             parent_id: Vec::with_capacity(capacity),
-            work_id: Vec::with_capacity(capacity),
+            id: Vec::with_capacity(capacity),
             amount: Vec::with_capacity(capacity),
             command: Vec::with_capacity(capacity),
             trace_name: Vec::with_capacity(capacity),
@@ -217,7 +217,7 @@ impl Group {
                 self.pid.swap(i, i - 1);
                 self.span_id.swap(i, i - 1);
                 self.parent_id.swap(i, i - 1);
-                self.work_id.swap(i, i - 1);
+                self.id.swap(i, i - 1);
                 self.amount.swap(i, i - 1);
                 self.command.swap(i, i - 1);
                 self.trace_name.swap(i, i - 1);
@@ -286,7 +286,7 @@ impl Group {
                 self.pid.push(0);
                 self.span_id.push(0);
                 self.parent_id.push(0);
-                self.work_id.push(0);
+                self.id.push(0);
                 self.amount.push(amount as i64);
                 self.command.push(command.into());
                 self.trace_name.push(Bytes::new().into());
@@ -302,7 +302,7 @@ impl Group {
                 pid,
                 span_id,
                 parent_id,
-                work_id,
+                id,
                 amount,
                 name,
                 command,
@@ -315,7 +315,7 @@ impl Group {
                 self.pid.push(pid);
                 self.span_id.push(span_id);
                 self.parent_id.push(parent_id);
-                self.work_id.push(work_id);
+                self.id.push(id);
                 self.amount.push(amount);
                 self.command.push(command.into());
                 self.trace_name.push(name.into());
@@ -331,7 +331,7 @@ impl Group {
                 pid,
                 span_id,
                 parent_id,
-                work_id,
+                id,
                 amount,
                 name,
                 command,
@@ -343,7 +343,7 @@ impl Group {
                 self.pid.push(pid);
                 self.span_id.push(span_id);
                 self.parent_id.push(parent_id);
-                self.work_id.push(work_id);
+                self.id.push(id);
                 self.amount.push(amount);
                 self.command.push(command.into());
                 self.trace_name.push(name.into());
@@ -364,7 +364,7 @@ impl Group {
         self.pid.clear();
         self.span_id.clear();
         self.parent_id.clear();
-        self.work_id.clear();
+        self.id.clear();
         self.amount.clear();
         self.command.clear();
         self.trace_name.clear();
@@ -381,7 +381,7 @@ impl Group {
     fn add_empty_trace(&mut self) {
         self.span_id.push(0);
         self.parent_id.push(0);
-        self.work_id.push(0);
+        self.id.push(0);
         self.amount.push(0);
         self.trace_name.push(Bytes::new().into());
     }
@@ -501,12 +501,12 @@ impl<W: Write + Send> GroupWriter<W> {
             .context("parent_id")?;
         parent_id.close()?;
 
-        let mut work_id = rows.next_column()?.expect("work_id column");
-        work_id
+        let mut id = rows.next_column()?.expect("id column");
+        id
             .typed::<Int64Type>()
-            .write_batch(&group.work_id, None, None)
-            .context("work_id")?;
-        work_id.close()?;
+            .write_batch(&group.id, None, None)
+            .context("id")?;
+        id.close()?;
 
         let mut amount = rows.next_column()?.expect("amount column");
         amount
diff --git a/tracing-past/src/lib.rs b/tracing-past/src/lib.rs
index 0b375df..0dc5b05 100644
--- a/tracing-past/src/lib.rs
+++ b/tracing-past/src/lib.rs
@@ -12,21 +12,21 @@ pub fn init() {
 struct SpanInfo {
     span_id: u64,
     parent_span_id: u64,
-    work_id: u64,
+    id: u64,
     amount: u64,
     name: [u8; 16],
 
     exit_stack: bool,
 }
 
-const WORK_ID: &str = "work_id";
+const ID: &str = "id";
 const THROUGHPUT_METRIC: &str = "amount";
 const EXIT_STACK: &str = "exit_stack";
 
 impl Visit for SpanInfo {
     fn record_u64(&mut self, field: &tracing_core::Field, value: u64) {
         match field.name() {
-            WORK_ID => self.work_id = value,
+            ID => self.id = value,
             THROUGHPUT_METRIC => self.amount = value,
             _ => {}
         }
@@ -38,14 +38,7 @@ impl Visit for SpanInfo {
         }
     }
 
-    fn record_debug(&mut self, field: &tracing_core::Field, _: &dyn std::fmt::Debug) {
-        match field.name() {
-            WORK_ID => debug_assert!(false, "field `work_id` is not u64"),
-            THROUGHPUT_METRIC => {
-                debug_assert!(false, "field `amount` is not u64")
-            }
-            _ => {}
-        }
+    fn record_debug(&mut self, _: &tracing_core::Field, _: &dyn std::fmt::Debug) {
     }
 }
 
@@ -68,7 +61,7 @@ where
                 name: buf,
                 parent_span_id: attrs.parent().or(ctx.current_span().id()).map_or(0, |id| id.into_u64()),
                 span_id: id.into_u64(),
-                work_id: 0,
+                id: 0,
                 amount: 0,
                 exit_stack: false,
             };
@@ -86,7 +79,7 @@ where
                 enter,
                 span_info.span_id as *const u64,
                 span_info.parent_span_id as *const u64,
-                span_info.work_id as *const u64,
+                span_info.id as *const u64,
                 span_info.amount as *const u64,
                 span_info.name.as_ptr()
             );