diff --git a/src/app/DatasetCategory.cpp b/src/app/DatasetCategory.cpp
index bca33cc..db88af0 100644
--- a/src/app/DatasetCategory.cpp
+++ b/src/app/DatasetCategory.cpp
@@ -1,21 +1,15 @@
 #include "DatasetCategory.hpp"
+#include "repo/CategoryDescriptor.hpp"
 
 namespace geopro::app {
 
 CategoryBuckets splitByCategory(const std::vector<geopro::data::DsRow>& rows) {
-    const auto& cfg = categoryConfigs();
+    const auto& cat = geopro::data::categoryCatalog();
     CategoryBuckets b;
-    b.segments.resize(cfg.size());
-    for (const auto& r : rows) {
-        int hit = -1;
-        // 先按 ddCode（三维体/切片）——它们无 dsTypeCode（来自 Api3dRepository mock 行）。
-        for (std::size_t i = 0; i < cfg.size() && hit < 0; ++i)
-            if (!cfg[i].ddCode.empty() && r.ddCode == cfg[i].ddCode) hit = static_cast<int>(i);
-        // 再按 dsTypeCode。
-        for (std::size_t i = 0; i < cfg.size() && hit < 0; ++i)
-            if (!cfg[i].dsTypeCode.empty() && r.dsTypeCode == cfg[i].dsTypeCode) hit = static_cast<int>(i);
-        if (hit >= 0) b.segments[static_cast<std::size_t>(hit)].push_back(r);
-    }
+    b.segments.resize(cat.size());
+    for (const auto& r : rows)
+        for (std::size_t i = 0; i < cat.size(); ++i)
+            if (cat[i].classify && cat[i].classify(r)) { b.segments[i].push_back(r); break; }
     return b;
 }
 
diff --git a/src/data/CMakeLists.txt b/src/data/CMakeLists.txt
index 58d4560..1c025cd 100644
--- a/src/data/CMakeLists.txt
+++ b/src/data/CMakeLists.txt
@@ -5,6 +5,7 @@ add_library(geopro_data STATIC
   repo/LocalSampleRepository.cpp
   repo/LocalSample3dRepository.cpp
   repo/DatasetFieldDictionary.cpp
+  repo/CategoryDescriptor.cpp
   dto/NavDto.cpp
   dto/Vtk3dRequests.cpp
   dto/DatasetChartDto.cpp
diff --git a/src/data/repo/CategoryDescriptor.cpp b/src/data/repo/CategoryDescriptor.cpp
new file mode 100644
index 0000000..d179f80
--- /dev/null
+++ b/src/data/repo/CategoryDescriptor.cpp
@@ -0,0 +1,47 @@
+#include "repo/CategoryDescriptor.hpp"
+#include <vector>
+
+namespace geopro::data {
+
+std::function<bool(const DsRow&)> byDdCode(std::initializer_list<std::string> codes) {
+    std::vector<std::string> cs(codes);
+    return [cs](const DsRow& r) {
+        for (const auto& c : cs) if (r.ddCode == c) return true;
+        return false;
+    };
+}
+std::function<bool(const DsRow&)> byDsTypeCode(std::initializer_list<std::string> codes) {
+    std::vector<std::string> cs(codes);
+    return [cs](const DsRow& r) {
+        for (const auto& c : cs) if (r.dsTypeCode == c) return true;
+        return false;
+    };
+}
+
+const std::vector<CategoryDescriptor>& categoryCatalog() {
+    static const std::vector<CategoryDescriptor> kCat = {
+        {"resistivity", "电阻率数据",   SceneKind::Curtain3D,
+         byDsTypeCode({"ERT platform inversion data"}),
+         {FilterKind::DateRange, FilterKind::ArrayType},
+         {OpKind::GenerateVolume, OpKind::Filter}, "curtain"},
+        {"apparent", "视电阻率数据", SceneKind::Curtain3D,
+         byDsTypeCode({"visual resistivity data"}),
+         {FilterKind::DateRange, FilterKind::ArrayType},
+         {OpKind::GenerateVolume, OpKind::Filter}, "curtain"},
+        {"transient", "瞬变电磁数据", SceneKind::Curtain3D,
+         byDsTypeCode({"DD TRANSIENT ELECTROMAGNETIC INVERSION"}),
+         {FilterKind::DateRange},
+         {OpKind::GenerateVolume, OpKind::Filter}, "curtain"},
+        {"voxel", "三维体", SceneKind::Volume3D,
+         byDdCode({"dd_voxel"}),
+         {FilterKind::DateRange},
+         {OpKind::Filter}, "volume"},
+        {"trajectory", "轨迹数据", SceneKind::Plane2D,
+         byDdCode({"dd_trajectory_data"}),
+         {FilterKind::DateRange},
+         {OpKind::PlaneZ, OpKind::Filter, OpKind::Basemap}, "plane2d"},
+    };
+    return kCat;
+}
+
+}  // namespace geopro::data
diff --git a/src/data/repo/CategoryDescriptor.hpp b/src/data/repo/CategoryDescriptor.hpp
new file mode 100644
index 0000000..8513578
--- /dev/null
+++ b/src/data/repo/CategoryDescriptor.hpp
@@ -0,0 +1,30 @@
+#pragma once
+#include <functional>
+#include <initializer_list>
+#include <string>
+#include <vector>
+#include "repo/RepoTypes.hpp"  // DsRow
+
+namespace geopro::data {
+
+enum class SceneKind { Volume3D, Curtain3D, Plane2D };          // 渲染语义/共存规则
+enum class FilterKind { DateRange, ArrayType };                 // 筛选器契约（可扩展）
+enum class OpKind { GenerateVolume, Filter, PlaneZ, Basemap };  // 段操作契约（可扩展）
+
+struct CategoryDescriptor {
+    std::string id;
+    std::string title;
+    SceneKind   sceneKind;
+    std::function<bool(const DsRow&)> classify;  // 轴1 数据来源/分类
+    std::vector<FilterKind> filters;             // 轴2 筛选器
+    std::vector<OpKind>     operations;          // 轴3 段头图标操作
+    std::string renderStrategyId;                // 轴4 渲染策略键
+};
+
+// classify 便捷构造器（常见按 ddCode / dsTypeCode 接入）
+std::function<bool(const DsRow&)> byDdCode(std::initializer_list<std::string> codes);
+std::function<bool(const DsRow&)> byDsTypeCode(std::initializer_list<std::string> codes);
+
+const std::vector<CategoryDescriptor>& categoryCatalog();
+
+}  // namespace geopro::data
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index e55bd49..cb66ab2 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -59,6 +59,8 @@ target_sources(geopro_tests PRIVATE data/test_nav_request.cpp)
 # GprVolumeRepository：逐线 GPR int16 量化体(BuiltI16)→ app 渲染链 float 体(VolumeGrid)。
 # 纯适配器逐值反量化 + 全链(合成多通道 .iprb 走真 P1/P2)产出有效 VolumeGrid。
 target_sources(geopro_tests PRIVATE data/test_gpr_volume_repository.cpp)
+# CategoryDescriptor：类目描述符目录 categoryCatalog(classify谓词+扩展契约) + splitByCategory 遍历路由。
+target_sources(geopro_tests PRIVATE data/test_category_descriptor.cpp)
 target_link_libraries(geopro_tests PRIVATE geopro_data)
 
 # store 层：ChunkedVolumeStore（GPR 三维体分块压缩落盘 round-trip + 边缘块 + 压缩生效）。
diff --git a/tests/app/test_dataset_category.cpp b/tests/app/test_dataset_category.cpp
index 82876f2..b5c7737 100644
--- a/tests/app/test_dataset_category.cpp
+++ b/tests/app/test_dataset_category.cpp
@@ -1,5 +1,6 @@
 #include <gtest/gtest.h>
 #include "DatasetCategory.hpp"
+#include "repo/CategoryDescriptor.hpp"
 using geopro::data::DsRow;
 using namespace geopro::app;
 
@@ -23,7 +24,8 @@ TEST(SplitByCategory, RoutesByDsTypeCodeAndDdCode) {
         row("x", "dd_ert_measurement_gr_data", "earth resistance"),              // 接地电阻 → 丢弃
     };
     const CategoryBuckets b = splitByCategory(rows);
-    ASSERT_EQ(b.segments.size(), categoryConfigs().size());
+    // splitByCategory 现走 categoryCatalog()（5 段，含 trajectory）；旧 categoryConfigs 暂保留供 UI。
+    ASSERT_EQ(b.segments.size(), geopro::data::categoryCatalog().size());
     EXPECT_EQ(b.segments[0].size(), 1u); EXPECT_EQ(b.segments[0][0].id, "a");
     EXPECT_EQ(b.segments[1].size(), 1u); EXPECT_EQ(b.segments[1][0].id, "b");
     EXPECT_EQ(b.segments[2].size(), 1u); EXPECT_EQ(b.segments[2][0].id, "c");
diff --git a/tests/data/test_category_descriptor.cpp b/tests/data/test_category_descriptor.cpp
new file mode 100644
index 0000000..ef4708a
--- /dev/null
+++ b/tests/data/test_category_descriptor.cpp
@@ -0,0 +1,35 @@
+#include <gtest/gtest.h>
+#include "repo/CategoryDescriptor.hpp"
+#include "DatasetCategory.hpp"
+
+using namespace geopro::data;
+
+TEST(CategoryCatalog, HasFiveSegmentsInOrder) {
+    const auto& cat = categoryCatalog();
+    ASSERT_EQ(cat.size(), 5u);
+    EXPECT_EQ(cat[0].id, "resistivity");
+    EXPECT_EQ(cat[3].id, "voxel");
+    EXPECT_EQ(cat[4].id, "trajectory");
+    EXPECT_EQ(cat[4].sceneKind, SceneKind::Plane2D);
+    EXPECT_EQ(cat[4].renderStrategyId, "plane2d");
+}
+
+TEST(CategoryCatalog, TrajectoryClassifiesByDdCode) {
+    const auto& cat = categoryCatalog();
+    DsRow traj; traj.id = "t1"; traj.ddCode = "dd_trajectory_data";
+    EXPECT_TRUE(cat[4].classify(traj));
+    DsRow vox; vox.ddCode = "dd_voxel";
+    EXPECT_FALSE(cat[4].classify(vox));
+}
+
+TEST(SplitByCategory, RoutesRowToFirstMatchingDescriptor) {
+    DsRow traj; traj.id = "t1"; traj.ddCode = "dd_trajectory_data";
+    DsRow ert;  ert.id = "e1";  ert.dsTypeCode = "ERT platform inversion data";
+    auto b = geopro::app::splitByCategory({traj, ert});
+    const auto& cat = categoryCatalog();
+    ASSERT_EQ(b.segments.size(), cat.size());
+    EXPECT_EQ(b.segments[0].size(), 1u);  // resistivity ← ert
+    EXPECT_EQ(b.segments[0][0].id, "e1");
+    EXPECT_EQ(b.segments[4].size(), 1u);  // trajectory ← traj
+    EXPECT_EQ(b.segments[4][0].id, "t1");
+}