diff --git a/nwb_linkml/pdm.lock b/nwb_linkml/pdm.lock
index f11882c..7306eec 100644
--- a/nwb_linkml/pdm.lock
+++ b/nwb_linkml/pdm.lock
@@ -5,7 +5,7 @@
 groups = ["default", "dev", "tests"]
 strategy = ["cross_platform", "inherit_metadata"]
 lock_version = "4.4.2"
-content_hash = "sha256:5f3b06ea8b752b60c44c392e6079a1e0af96ad60d4442faeef88bf055ee90529"
+content_hash = "sha256:a4d05bde012bc589ce24125d77ba68afedea5cf98ff044b6a0fb27f44d3982f1"
 
 [[package]]
 name = "annotated-types"
@@ -839,20 +839,20 @@ files = [
 [[package]]
 name = "linkml"
 version = "0.0.0"
-requires_python = "<4.0.0,>=3.8.1"
+requires_python = ">=3.8.1,<4.0.0"
 git = "https://github.com/sneakers-the-rat/linkml"
 ref = "nwb-linkml"
 revision = "df8685eb9e99eaf9ec694db2e9cd59bab8892438"
 summary = "Linked Open Data Modeling Language"
 groups = ["default", "dev", "tests"]
 dependencies = [
-    "antlr4-python3-runtime<4.10,==4.*,>=4.9.0",
+    "antlr4-python3-runtime<4.10,>=4.9.0",
     "click>=7.0",
     "graphviz>=0.10.1",
     "hbreader",
     "isodate>=0.6.0",
     "jinja2>=3.1.0",
-    "jsonasobj2==1.*,>=1.0.0,>=1.0.3",
+    "jsonasobj2<2.dev0,>=1.0.3",
     "jsonschema[format]>=4.0.0",
     "linkml-dataops",
     "linkml-runtime==1.8.0",
@@ -1132,6 +1132,45 @@ files = [
     {file = "packaging-24.1.tar.gz", hash = "sha256:026ed72c8ed3fcce5bf8950572258698927fd1dbda10a5e981cdf0ac37f4f002"},
 ]
 
+[[package]]
+name = "pandas"
+version = "2.2.2"
+requires_python = ">=3.9"
+summary = "Powerful data structures for data analysis, time series, and statistics"
+groups = ["default", "dev", "tests"]
+dependencies = [
+    "numpy>=1.22.4; python_version < \"3.11\"",
+    "numpy>=1.23.2; python_version == \"3.11\"",
+    "numpy>=1.26.0; python_version >= \"3.12\"",
+    "python-dateutil>=2.8.2",
+    "pytz>=2020.1",
+    "tzdata>=2022.7",
+]
+files = [
+    {file = "pandas-2.2.2-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:90c6fca2acf139569e74e8781709dccb6fe25940488755716d1d354d6bc58bce"},
+    {file = "pandas-2.2.2-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:c7adfc142dac335d8c1e0dcbd37eb8617eac386596eb9e1a1b77791cf2498238"},
+    {file = "pandas-2.2.2-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:4abfe0be0d7221be4f12552995e58723c7422c80a659da13ca382697de830c08"},
+    {file = "pandas-2.2.2-cp310-cp310-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:8635c16bf3d99040fdf3ca3db669a7250ddf49c55dc4aa8fe0ae0fa8d6dcc1f0"},
+    {file = "pandas-2.2.2-cp310-cp310-musllinux_1_1_aarch64.whl", hash = "sha256:40ae1dffb3967a52203105a077415a86044a2bea011b5f321c6aa64b379a3f51"},
+    {file = "pandas-2.2.2-cp310-cp310-musllinux_1_1_x86_64.whl", hash = "sha256:8e5a0b00e1e56a842f922e7fae8ae4077aee4af0acb5ae3622bd4b4c30aedf99"},
+    {file = "pandas-2.2.2-cp310-cp310-win_amd64.whl", hash = "sha256:ddf818e4e6c7c6f4f7c8a12709696d193976b591cc7dc50588d3d1a6b5dc8772"},
+    {file = "pandas-2.2.2-cp311-cp311-macosx_10_9_x86_64.whl", hash = "sha256:696039430f7a562b74fa45f540aca068ea85fa34c244d0deee539cb6d70aa288"},
+    {file = "pandas-2.2.2-cp311-cp311-macosx_11_0_arm64.whl", hash = "sha256:8e90497254aacacbc4ea6ae5e7a8cd75629d6ad2b30025a4a8b09aa4faf55151"},
+    {file = "pandas-2.2.2-cp311-cp311-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:58b84b91b0b9f4bafac2a0ac55002280c094dfc6402402332c0913a59654ab2b"},
+    {file = "pandas-2.2.2-cp311-cp311-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:6d2123dc9ad6a814bcdea0f099885276b31b24f7edf40f6cdbc0912672e22eee"},
+    {file = "pandas-2.2.2-cp311-cp311-musllinux_1_1_aarch64.whl", hash = "sha256:2925720037f06e89af896c70bca73459d7e6a4be96f9de79e2d440bd499fe0db"},
+    {file = "pandas-2.2.2-cp311-cp311-musllinux_1_1_x86_64.whl", hash = "sha256:0cace394b6ea70c01ca1595f839cf193df35d1575986e484ad35c4aeae7266c1"},
+    {file = "pandas-2.2.2-cp311-cp311-win_amd64.whl", hash = "sha256:873d13d177501a28b2756375d59816c365e42ed8417b41665f346289adc68d24"},
+    {file = "pandas-2.2.2-cp312-cp312-macosx_10_9_x86_64.whl", hash = "sha256:9dfde2a0ddef507a631dc9dc4af6a9489d5e2e740e226ad426a05cabfbd7c8ef"},
+    {file = "pandas-2.2.2-cp312-cp312-macosx_11_0_arm64.whl", hash = "sha256:e9b79011ff7a0f4b1d6da6a61aa1aa604fb312d6647de5bad20013682d1429ce"},
+    {file = "pandas-2.2.2-cp312-cp312-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:1cb51fe389360f3b5a4d57dbd2848a5f033350336ca3b340d1c53a1fad33bcad"},
+    {file = "pandas-2.2.2-cp312-cp312-manylinux_2_17_x86_64.manylinux2014_x86_64.whl", hash = "sha256:eee3a87076c0756de40b05c5e9a6069c035ba43e8dd71c379e68cab2c20f16ad"},
+    {file = "pandas-2.2.2-cp312-cp312-musllinux_1_1_aarch64.whl", hash = "sha256:3e374f59e440d4ab45ca2fffde54b81ac3834cf5ae2cdfa69c90bc03bde04d76"},
+    {file = "pandas-2.2.2-cp312-cp312-musllinux_1_1_x86_64.whl", hash = "sha256:43498c0bdb43d55cb162cdc8c06fac328ccb5d2eabe3cadeb3529ae6f0517c32"},
+    {file = "pandas-2.2.2-cp312-cp312-win_amd64.whl", hash = "sha256:d187d355ecec3629624fccb01d104da7d7f391db0311145817525281e2804d23"},
+    {file = "pandas-2.2.2.tar.gz", hash = "sha256:9e79019aba43cb4fda9e4d983f8e88ca0373adbb697ae9c6c43093218de28b54"},
+]
+
 [[package]]
 name = "parse"
 version = "1.20.2"
@@ -1549,6 +1588,16 @@ files = [
     {file = "PyTrie-0.4.0.tar.gz", hash = "sha256:8f4488f402d3465993fb6b6efa09866849ed8cda7903b50647b7d0342b805379"},
 ]
 
+[[package]]
+name = "pytz"
+version = "2024.1"
+summary = "World timezone definitions, modern and historical"
+groups = ["default", "dev", "tests"]
+files = [
+    {file = "pytz-2024.1-py2.py3-none-any.whl", hash = "sha256:328171f4e3623139da4983451950b28e95ac706e13f3f2630a879749e7a8b319"},
+    {file = "pytz-2024.1.tar.gz", hash = "sha256:2a29735ea9c18baf14b448846bde5a48030ed267578472d8955cd0e7443a9812"},
+]
+
 [[package]]
 name = "pyyaml"
 version = "6.0.1"
@@ -2072,6 +2121,17 @@ files = [
     {file = "typing_extensions-4.12.2.tar.gz", hash = "sha256:1a7ead55c7e559dd4dee8856e3a88b41225abfe1ce8df57b7c13915fe121ffb8"},
 ]
 
+[[package]]
+name = "tzdata"
+version = "2024.1"
+requires_python = ">=2"
+summary = "Provider of IANA time zone data"
+groups = ["default", "dev", "tests"]
+files = [
+    {file = "tzdata-2024.1-py2.py3-none-any.whl", hash = "sha256:9068bc196136463f5245e51efda838afa15aaeca9903f49050dfa2679db4d252"},
+    {file = "tzdata-2024.1.tar.gz", hash = "sha256:2674120f8d891909751c38abcdfd386ac0a5a1127954fbc332af6b5ceae07efd"},
+]
+
 [[package]]
 name = "uri-template"
 version = "1.3.0"
diff --git a/nwb_linkml/pyproject.toml b/nwb_linkml/pyproject.toml
index d24847a..f1b7268 100644
--- a/nwb_linkml/pyproject.toml
+++ b/nwb_linkml/pyproject.toml
@@ -24,6 +24,7 @@ dependencies = [
     'typing-extensions>=4.12.2;python_version<"3.11"',
     "numpydantic>=1.2.1",
     "black>=24.4.2",
+    "pandas>=2.2.2",
 ]
 
 [project.urls]