diff --git a/src/schema/objects/columns.yaml b/src/schema/objects/columns.yaml
index 5010d2453f..c97719519e 100644
--- a/src/schema/objects/columns.yaml
+++ b/src/schema/objects/columns.yaml
@@ -47,8 +47,7 @@ alpha_rotation:
   display_name: Alpha rotation
   description: |
     Euler angle to match probe extension dimensions (width, height, depth) to global x, y, z coordinates.
-  unit:
-    degree
+  unit: degree
 associated_brain_region:
   name: associated_brain_region
   display_name: Associated brain region
@@ -67,16 +66,15 @@ associated_brain_region_quality_type:
   name: associated_brain_region_quality_type
   display_name: Associated brain region quality type
   description: |
-     The method used to identify the associated brain region (estimated|proof)
-     depending on anatomical pictures proofing the location or indirect estimation of the location.
+    The method used to identify the associated brain region (estimated|proof)
+    depending on anatomical pictures proofing the location or indirect estimation of the location.
   type: string
 beta_rotation:
   name: beta_rotation
   display_name: Beta rotation
   description: |
     Euler angle to match probe extension dimensions (width, height, depth) to global x, y, z coordinates.
-  unit:
-    degree
+  unit: degree
 cardiac:
   name: cardiac
   display_name: Cardiac measurement
@@ -95,6 +93,24 @@ channel:
     In the absence of a delimiter, tools MUST interpret any character as being part
     of a channel name.
   type: string
+channel_id:
+  name: channel_id
+  display_name: Channel ID
+  description: |
+    Unique identifier of the channel, only containing letters and numbers.
+    This id must be reflected in the data files, for example, as signal annotations in the nix file.
+    When inserting existing nwb files into a BIDS structure, one can combine
+    the nwb record_id and channel_index to create this unique identifier.
+  type: string
+  pattern: ^[0-9a-zA-Z]+$
+channel_label:
+  name: channel_label
+  display_name: Channel label
+  description: |
+    Human readable identifier. Use this name to specify the
+    content of signals not generated by electrodes. For example,
+    'DAQ internal synchronization signals', 'behavioral signals', 'behavioral cues', etc.
+  type: string
 color:
   name: color
   display_name: Color label
@@ -125,13 +141,30 @@ contact_count:
   description: |
     Number of miscellaneous analog contacts for auxiliary signals.
   type: number
+coordinate_reference_point:
+  name: coordinate_reference_point
+  display_name: Coordinate reference point
+  description: |
+    Point of the probe that is described by the probe coordinates and
+    on which the alpha, beta and gamma rotations are applied.
+  type: string
+data_entity_id:
+  name: data_entity_id
+  display_name: Data entity ID
+  description: |
+    The corresponding (UUID) identifier of the recording trace in the data file.
+    The same `data_entity_id` can be listed multiple times with different
+    `onset` and `duration` values to select a subset of a recording trace.
+  type: string
 depth__probes:
-  name: height
-  display_name: Height
+  name: depth
+  display_name: Depth
   description: |
-    Physical height of the probe.
+    Physical depth of the probe, for example, '0.3'.
+    This dimension should be omitted or set to 0 for two-dimensional (shank-type) probes.
+    This dimension corresponds to the z’axis of the Euler transformation defined by
+    alpha, beta and gamma rotations values.
   type: number
-  unit: mm
 detector__channels:
   name: detector
   display_name: Detector Name
@@ -204,6 +237,14 @@ dimension:
     Size of the group (grid/strip/probe) that this electrode belongs to.
     Must be of form `[AxB]` with the smallest dimension first (for example, `[1x8]`).
   type: string
+# TODO: Add unit enums if everyone agrees to keep this column.
+dimension_unit:
+  name: dimension_unit
+  display_name: Dimension unit
+  description: |
+    Units of the physical dimensions  'width', 'height' and 'depth' of the probe.
+    For example, `mm`.
+  type: string
 duration:
   name: duration
   display_name: Event duration
@@ -219,6 +260,31 @@ duration:
     - type: string
       enum:
         - n/a
+duration_index:
+  name: duration_index
+  display_name: Duration index
+  description: |
+    Number of recording samples included in the event.
+  type: number
+electrode_count:
+  name: electrode_count
+  display_name: Electrode count
+  description: |
+    Number of miscellaneous analog electrodes for auxiliary signals (for example, '2').
+  type: number
+electrode_id:
+  name: electrode_id
+  display_name: Electrode ID
+  description: |
+    A unique identifier of the electrode.
+    (expected to match electrode_ids listed in `*_channels.tsv`).
+  type: string
+electrode_shape:
+  name: electrode_shape
+  display_name: Electrode shape
+  description: |
+    Description of the shape of the electrode (for example, `square`, `circle`).
+  type: string
 filename:
   name: filename
   display_name: Filename
@@ -226,13 +292,29 @@ filename:
     Relative paths to files.
   type: string
   format: participant_relative
+# TODO: Figure out and add rule for default values.
+gain:
+  name: gain
+  display_name: Gain
+  description: |
+    Amplification factor applied from signal detection at the electrode
+    to the signal stored in the data file.
+    If no gain factor is provided it is assumed to be 1.
+  type: number
 gamma_rotation:
   name: gamma_rotation
   display_name: Gamma rotation
   description: |
     Euler angle to match probe extension dimensions (width, height, depth) to global x, y, z coordinates.
-  unit:
-    degree
+  unit: degree
+# TODO: Clarify if the optionality of the column be defined here or as an addendum in the rules.
+ground:
+  name: ground
+  display_name: Ground
+  description: |
+    Information on the ground. For example, 'chamber screw', 'head post', 'ear clip'.
+    Only should be used to optionally override the global ground in the `_ecephys.json` or `_icephys.json` file.
+  type: string
 group__channel:
   name: group
   display_name: Channel group
@@ -274,13 +356,26 @@ handedness:
     - AMBIDEXTROUS
     - Ambidextrous
     - n/a
+hardware_filters:
+  name: hardware_filters
+  display_name: Hardware filters
+  description: |
+    List of hardware (amplifier) filter keys applied.
+    Note that parameters should be defined in the general microephys sidecar .json file.
+    Indicate `n/a` in the absence of hardware filters applied.
+  anyOf:
+    - type: string
+    - type: string
+      enum:
+        - n/a
 height__probes:
   name: height
   display_name: Height
   description: |
-    Physical height of the probe.
+    Physical height of the probe, for example, '5'.
+    This dimension corresponds to the y’axis of the Euler transformation defined by
+    alpha, beta and gamma rotations values below.
   type: number
-  unit: mm
 hemisphere:
   name: hemisphere
   display_name: Electrode hemisphere
@@ -290,6 +385,16 @@ hemisphere:
   enum:
     - $ref: objects.enums.left_hemisphere.value
     - $ref: objects.enums.right_hemisphere.value
+# TODO: Should the hemisphere details be unified for electrodes and probes or will it break other modality?
+hemisphere__probes:
+  name: hemisphere
+  display_name: Hemisphere
+  description: |
+    Hemisphere in which the probe is placed.
+  type: string
+  enum:
+    - $ref: objects.enums.left_hemisphere.value
+    - $ref: objects.enums.right_hemisphere.value
 high_cutoff:
   name: high_cutoff
   display_name: High cutoff
@@ -325,6 +430,12 @@ index:
   description: |
     The label integer index.
   type: integer
+location:
+  name: location
+  display_name: Location
+  description: |
+    An indication on the location of the electrode (for example, `cortical layer 3`, `CA1`).
+  type: string
 low_cutoff:
   name: low_cutoff
   display_name: Low cutoff
@@ -344,6 +455,13 @@ manufacturer:
     The manufacturer for each electrode.
     Can be used if electrodes were manufactured by more than one company.
   type: string
+# TODO: Should the manufacturer details be unified for electrodes and probes?
+manufacturer__probes:
+  name: manufacturer
+  display_name: Manufacturer
+  description: |
+    Manufacturer of the probes system  (for example, 'openephys', 'alphaomega','blackrock').
+  type: string
 mapping:
   name: mapping
   display_name: Label mapping
@@ -434,6 +552,12 @@ onset:
     acquired data point.
   type: number
   unit: s
+onset_index:
+  name: onset_index
+  display_name: Onset index
+  description: |
+    Index of the onset recording sample (0 based) within the data entity.
+  type: integer
 pathology:
   name: pathology
   display_name: Pathology
@@ -451,6 +575,28 @@ participant_id:
     matching a participant entity found in the dataset.
   type: string
   pattern: ^sub-[0-9a-zA-Z]+$
+pipette_solution:
+  name: pipette_solution
+  display_name: Pipette solution
+  description: |
+    The solution used to fill the pipette.
+    See also [openMINDS Pipette]
+    (https://github.com/openMetadataInitiative/openMINDS_ephys/blob/v1/schemas/device/pipetteUsage.schema.tpl.json).
+  type: string
+internal_pipette_diameter:
+  name: internal_pipette_diameter
+  display_name: Internal pipette diameter
+  description: |
+    The internal diameter of the pipette in micrometers.
+  type: number
+  unit: mm
+external_pipette_diameter:
+  name: external_pipette_diameter
+  display_name: External pipette diameter
+  description: |
+    The external diameter of the pipette in micrometers.
+  type: number
+  unit: mm
 placement__motion:
   name: placement
   display_name: Placement
@@ -466,6 +612,19 @@ plasma_radioactivity:
     Radioactivity in plasma, in unit of plasma radioactivity (for example, `kBq/mL`).
   type: number
 # reference column for channels.tsv files for EEG data
+probe_id:
+  name: probe_id
+  display_name: Probe ID
+  description: |
+    A unique identifier of the probe, can be identical with the `device_serial_number`.
+    (expected to match probe_ids listed in `*_eletrodes.tsv`).
+  type: string
+recording_mode:
+  name: recording_mode
+  display_name: Recording mode
+  description: |
+    The mode of recording for patch clamp datasets (for example, `voltage clamp`, `current clamp`).
+  type: string
 reference__eeg:
   name: reference
   display_name: Electrode reference
@@ -474,6 +633,13 @@ reference__eeg:
     This column is not needed when it is common to all channels.
     In that case the reference electrode(s) can be specified in `*_eeg.json` as `EEGReference`).
   type: string
+reference__microephys:
+  name: reference
+  display_name: Reference
+  description: |
+    Name of the electrode used as physical reference.
+    For example, electrode_id, physical location (subdural, chamber screw).
+  type: string
 # reference column for channels.tsv files for iEEG data
 reference__ieeg:
   name: reference
@@ -490,7 +656,8 @@ reference_atlas:
   name: reference_atlas
   display_name: Reference atlas
   description: |
-    Name of reference atlas used for associated brain region identification, preferably an ebrains supported atlas.
+    Name of reference atlas used for associated brain region identification,
+    preferably an [ebrains supported atlas](https://ebrains.eu/services/atlases#services).
   type: string
 reference_frame:
   name: reference_frame
@@ -593,6 +760,13 @@ sex:
     - OTHER
     - Other
     - n/a
+shank_id:
+  name: shank_id
+  display_name: Shank ID
+  description: |
+    A unique identifier to specify which shank of the probe the electrode is on.
+    This is useful for spike sorting when the electrodes are on a multi-shank probe.
+  type: string
 short_channel:
   name: short_channel
   display_name: Short Channel
@@ -621,6 +795,20 @@ software_filters:
     - type: string
       enum:
         - n/a
+# TODO: This seems very confusing. Should be merge with the column above?
+software_filters__channels:
+  name: software_filters
+  display_name: Software filters
+  description: |
+    List of temporal and/or spatial software filters applied
+    (for example, `SSS`, `SpatialCompensation`).
+    Note that parameters should be defined in the general microephys sidecar .json file.
+    Indicate `n/a` in the absence of software filters applied.
+  anyOf:
+    - type: string
+    - type: string
+      enum:
+        - n/a
 source__channels:
   name: source
   display_name: Source name
@@ -699,6 +887,22 @@ strain_rrid:
     of the strain of the species, for example: `RRID:IMSR_JAX:000664`.
   type: string
   format: rrid
+stream_id:
+  name: stream_id
+  display_name: Stream ID
+  description: |
+    Data stream of the recording the signal.
+  type: string
+# TODO: Clarify if column values can be arrays.
+surgery_date:
+  name: surgery_date
+  display_name: Surgery date
+  description: |
+    Date(s) of surgery. Datetime format and their anonymization
+    are described in [Units](SPEC_ROOT/common-principles.md#units).
+    The details of the surgery should be described in the sidecar json file.
+  type: string
+  format: datetime
 time:
   name: time
   display_name: Time
@@ -707,6 +911,19 @@ time:
     For example, 5.
   type: number
   unit: s
+time_offset:
+  name: time_offset
+  display_name: Time offset
+  description: |
+    Time shift between signal of this channel to a reference channel in seconds.
+  type: number
+  unit: s
+time_reference_channel:
+  name: time_reference_channel
+  display_name: Time reference channel
+  description: |
+    Name of the channel that is used for time alignment of signals.
+  type: string
 tracked_point__channels:
   name: tracked_point
   display_name: Tracked point channel
@@ -714,6 +931,16 @@ tracked_point__channels:
     Label of the point that is being tracked, for example, label of a tracker
     or a marker (for example,`"LeftFoot"`, `"RightWrist"`).
   type: string
+# TODO: Add relative links to `trial_type` column and events.tsv description.
+trial_id:
+  name: trial_id
+  display_name: Trial ID
+  description: |
+    If the data entity belongs to set of data_entities forming a trial,
+    they have to be linked to the same trial_id. This can be used to e.g. group stimulation and response records.
+    The optional `trial_type` events.tsv column can be used to provide the further information on the trial like
+    `electric stimulation`,`rest`, or `pharmaceutical stimulation`, etc.
+  type: string
 trial_type:
   name: trial_type
   display_name: Trial type
@@ -730,6 +957,7 @@ trigger:
   description: |
     continuous measurement of the scanner trigger signal
   type: number
+# TODO: Populate enums that make sense for channels in the microephys datasets.
 # type column in channels.tsv files
 type__channels:
   name: type
@@ -819,6 +1047,15 @@ units:
     (see [Units](SPEC_ROOT/common-principles.md#units)).
   type: string
   format: unit
+units__channels:
+  name: units
+  display_name: Units
+  description: |
+    Physical unit of the value represented in this channel,
+    for example, `V` for Volt, or `uV` for micro Volt
+    (see [Units](SPEC_ROOT/common-principles.md#units)).
+  type: string
+  format: unit
 units__nirs:
   name: units
   display_name: Units
@@ -896,9 +1133,10 @@ width__probes:
   name: width
   display_name: Width
   description: |
-    Physical width of the probe.
+    Physical width of the probe, for example, '5'.
+    This dimension corresponds to the x’axis of the Euler transformation defined by
+    alpha, beta and gamma rotations values.
   type: number
-  unit: mm
 x:
   name: x
   display_name: X position
@@ -954,6 +1192,46 @@ z__optodes:
     - type: string
       enum:
         - n/a
+# TODO: How are the units specified for the probe x, y and z fields?
+x__probes:
+  name: x
+  display_name: Probe X position
+  description: |
+    Probe position along the global coordinate system x-axis.
+  type: number
+y__probes:
+  name: y
+  display_name: Probe Y position
+  description: |
+    Probe position along the global coordinate system y-axis.
+  type: number
+z__probes:
+  name: z
+  display_name: Probe Z position
+  description: |
+    Probe position along the global coordinate system z-axis.
+  type: number
+x__electrodes:
+  name: x
+  display_name: Electrode X position
+  description: |
+    Recorded position along the local width-axis relative
+    to the probe origin and rotation (see `_probes.tsv`)
+  type: number
+y__electrodes:
+  name: y
+  display_name: Electrode Y position
+  description: |
+    Recorded position along the local height-axis relative
+    to the probe origin and rotation (see `_probes.tsv`)
+  type: number
+z__electrodes:
+  name: z
+  display_name: Electrode Z position
+  description: |
+    Recorded position along the local depth-axis relative
+    to the probe origin and rotation (see `_probes.tsv`)
+  type: number
 template_x:
   name: template_x
   display_name: X template position
diff --git a/src/schema/objects/metadata.yaml b/src/schema/objects/metadata.yaml
index 57515dd6f0..38c944c79d 100644
--- a/src/schema/objects/metadata.yaml
+++ b/src/schema/objects/metadata.yaml
@@ -1853,6 +1853,54 @@ MEGREFChannelCount:
     `MEGREFChannelCount` should be set to `0`.
   type: integer
   minimum: 0
+# TODO: Change if needs to be broken down into ecephys and icephys
+# TODO: Add links to the 2D coordinate system, Pixels and glossary entry.
+# TODO: Add enums for the valid values specific to microephys
+MicroephysCoordinateSystem:
+  name: MicroephysCoordinateSystem
+  display_name: Microephys Coordinate System
+  description: |
+    Defines the coordinate system for the microelectrode probes.
+    See the
+    [Coordinate Systems Appendix](SPEC_ROOT/appendices/coordinate-systems.md)
+    for a list of restricted keywords for coordinate systems.
+    If `"Other"`, provide definition of the coordinate system in
+    `"MicroephysCoordinateSystemDescription"`. If positions correspond to
+    pixel indices in a 2D image (of either a volume-rendering,
+    surface-rendering, operative photo, or operative drawing),
+    this MUST be "Pixels". For more information, see the section
+    on 2D coordinate systems.
+    For a list of valid values for this field, see the associated glossary entry.
+  anyOf:
+    # - $ref: objects.enums._MicroephysCoordSys
+    - $ref: objects.enums._StandardTemplateCoordSys
+MicroephysCoordinateSystemDescription:
+  name: MicroephysCoordinateSystemDescription
+  display_name: Microephys Coordinate System Description
+  description: |
+    Free-form text description of the coordinate system.
+    May also include a link to a documentation page or paper describing the
+    system in greater detail.
+  type: string
+MicroephysCoordinateUnits:
+  name: MicroephysCoordinateUnits
+  display_name: Microephys Coordinate Units
+  description: |
+    Units of the coordinates of `"MicroephysCoordinateSystem"`.
+  type: string
+# TODO: Clarify if units need to be used or enums, if units, define pixels
+  enum:
+    - m
+    - mm
+    - cm
+    - pixels
+MicroephysCoordinateSystemPhoto:
+  name: MicroephysCoordinateSystemPhoto
+  display_name: Microephys Coordinate System Photo
+  description: |
+    A link to a photo or drawing of the microelectrode probe system.
+  type: string
+  format: uri
 MISCChannelCount:
   name: MISCChannelCount
   display_name: Miscellaneous channel count
@@ -1970,6 +2018,12 @@ ManufacturersModelName:
   description: |
     Manufacturer's model name of the equipment that produced the measurements.
   type: string
+ManufacturersModelVersion:
+  name: ManufacturersModelVersion
+  display_name: Manufacturers Model Version
+  description: |
+    Manufacturer's model version of the equipment that produced the measurements.
+  type: string
 MatrixCoilMode:
   name: MatrixCoilMode
   display_name: Matrix Coil Mode
@@ -2657,6 +2711,12 @@ RecordingDuration:
     Length of the recording in seconds (for example, `3600`).
   type: number
   unit: s
+RecordingSetupName:
+  name: RecordingSetupName
+  display_name: Recording Setup Name
+  description: |
+    Custom name of the recording setup.
+  type: string
 RecordingType:
   name: RecordingType
   display_name: Recording Type
@@ -3392,6 +3452,13 @@ SubjectArtefactDescription:
     If this field is set to `"n/a"`, it will be interpreted as absence of major
     source of artifacts except cardiac and blinks.
   type: string
+SupplementarySignals:
+  name: SupplementarySignals
+  display_name: Supplementary Signals
+  description: |
+    Description of the supplementary signal (additional modalities) recorded
+    in parallel and are also stored in the data file.
+  type: string
 TaskDescription:
   name: TaskDescription
   display_name: Task Description
diff --git a/src/schema/rules/modalities.yaml b/src/schema/rules/modalities.yaml
index 2f290ca014..e4bdf56974 100644
--- a/src/schema/rules/modalities.yaml
+++ b/src/schema/rules/modalities.yaml
@@ -31,3 +31,7 @@ motion:
 nirs:
   datatypes:
     - nirs
+microephys:
+  datatypes:
+    - ecephys
+    - icephys
diff --git a/src/schema/rules/sidecars/microephys.yaml b/src/schema/rules/sidecars/microephys.yaml
new file mode 100644
index 0000000000..9ba92c2665
--- /dev/null
+++ b/src/schema/rules/sidecars/microephys.yaml
@@ -0,0 +1,117 @@
+#
+# Groups of related metadata fields
+#
+# Assumptions: never need disjunction of selectors
+# Assumptions: top-to-bottom overrides is sufficient logic
+
+---
+# Groups are defined as they appear in the proposal
+
+microephysInstitutionInformation:
+  selectors:
+    - datatype == ["ecephys", "icephys"]
+    - suffix == ["ecephys", "icephys"]
+  fields:
+    InstitutionName: recommended
+    InstitutionAddress: recommended
+    InstitutionalDepartmentName: recommended
+
+microephysSetup:
+  selectors:
+    - datatype == ["ecephys", "icephys"]
+    - suffix == ["ecephys", "icephys"]
+  fields:
+    PowerLineFrequency: required
+    Manufacturer:
+      level: recommended
+      description_addendum: For example, `"TDT"`, `"Blackrock"`.
+    ManufacturersModelName: recommended
+    ManufacturersModelVersion: recommended
+    RecordingSetupName: recommended
+    SamplingFrequency:
+      level: required
+      description_addendum: |
+         Internal (maximum) sampling frequency (in Hz)
+         of the recording (for example, "24000").
+    DeviceSerialNumber:
+      level: recommended
+      description_addendum: |
+         The serial number of the components of the setup,
+         recommended to add serial numbers and versions of
+         ALL components constituting the setup.
+    SoftwareName:
+      level: recommended
+      description_addendum: |
+         The name of the software suite used to
+         record the data.
+    SoftwareVersions: recommended
+
+microephysProcessing:
+  selectors:
+    - datatype == ["ecephys", "icephys"]
+    - suffix == ["ecephys", "icephys"]
+  fields:
+    SoftwareFilters: required
+    HardwareFilters: recommended
+
+microephysPharmaceuticals:
+  selectors:
+    - datatype == ["ecephys", "icephys"]
+    - suffix == ["ecephys", "icephys"]
+  fields:
+    PharmaceuticalName: recommended
+    PharmaceuticalDoseAmount: recommended
+    PharmaceuticalDoseUnits: recommended
+    PharmaceuticalDoseRegimen: recommended
+    PharmaceuticalDoseTime: recommended
+
+# TODO: Check how to conditionally change level to required for photo if
+# MicroephysCoordinateSystem is Pixels
+microephysCoordsystemGeneral:
+  selectors:
+    - datatype == ["ecephys", "icephys"]
+    - suffix == "coordsystem"
+  fields:
+    MicroephysCoordinateSystem: required
+    MicroephysCoordinateSystemDescription: recommended
+    MicroephysCoordinateUnits: required
+    MicroephysCoordinateSystemPhoto: optional
+
+microephysSupplementary:
+  selectors:
+    - datatype == ["ecephys", "icephys"]
+    - suffix == ["ecephys", "icephys"]
+  fields:
+    SupplementarySignals: optional
+
+microephysSample:
+  selectors:
+    - datatype == ["ecephys", "icephys"]
+    - suffix == ["ecephys", "icephys"]
+  fields:
+    BodyPart: recommended
+    BodyPartDetails: recommended
+    BodyPartDetailsOntology: optional
+    SampleEnvironment: recommended
+    SampleEmbedding: optional
+    SliceThickness: optional
+    SampleExtractionProtocol: optional
+
+microephysTaskInformation:
+  selectors:
+    - datatype == ["ecephys", "icephys"]
+    - suffix == ["ecephys", "icephys"]
+  fields:
+    TaskName:
+      level: recommended
+      description_addendum: |
+        A recommended convention is to name resting state task using labels
+        beginning with `rest`.
+    TaskDescription: recommended
+    Instructions:
+      level: recommended
+      description_addendum: |
+        This is especially important in context of resting state recordings and
+        distinguishing between eyes open and eyes closed paradigms.
+    CogAtlasID: recommended
+    CogPOID: recommended
diff --git a/src/schema/rules/tabular_data/microephys.yaml b/src/schema/rules/tabular_data/microephys.yaml
new file mode 100644
index 0000000000..a16655257e
--- /dev/null
+++ b/src/schema/rules/tabular_data/microephys.yaml
@@ -0,0 +1,100 @@
+---
+microephysProbes:
+  selectors:
+    - datatype == ["ecephys", "icephys"]
+    - suffix == "probes"
+    - extension == ".tsv"
+  initial_columns:
+    - probe_id
+    - type__probes
+    - x__probes
+    - y__probes
+    - z__probes
+  columns:
+    probe_id: required
+    type__probes: required
+    x__probes: recommended
+    y__probes: recommended
+    z__probes: recommended
+    manufacturer__probes: recommended
+    device_serial_number: recommended
+    electrode_count: optional
+    width__probes: optional
+    height__probes: optional
+    depth__probes: optional
+    dimension_unit: optional
+    alpha_rotation: recommended
+    beta_rotation: recommended
+    gamma_rotation: recommended
+    coordinate_reference_point: recommended
+    hemisphere__probes: recommended
+    associated_brain_region: recommended
+    associated_brain_region_id: recommended
+    associated_brain_region_quality_type: recommended
+    reference_atlas: recommended
+    material__probes: optional
+  index_columns: [probe_id]
+  additional_columns: allowed_if_defined
+
+microephysElectrodes:
+  selectors:
+    - datatype == ["ecephys", "icephys"]
+    - suffix == "electrodes"
+    - extension == ".tsv"
+  initial_columns:
+    - electrode_id
+    - probe_id
+    - hemisphere
+    - x__electrodes
+    - y__electrodes
+    - z__electrodes
+  columns:
+    electrode_id: required
+    probe_id: required
+    hemisphere: recommended
+    x__electrodes: recommended
+    y__electrodes: recommended
+    z__electrodes: recommended
+    impedance: recommended
+    shank_id: optional
+    size: optional
+    electrode_shape: optional
+    material: optional
+    location: recommended
+    pipette_solution: optional
+    internal_pipette_diameter: optional
+    external_pipette_diameter: optional
+  index_columns: [electrode_id]
+  additional_columns: allowed_if_defined
+
+microephysCCChannelsss:
+  selectors:
+    - datatype == ["ecephys", "icephys"]
+    - suffix == "channels"
+    - extension == ".tsv"
+  initial_columns:
+    - channel_id
+    - reference__microephys
+    - type__channels
+    - units__channels
+    - sampling_frequency
+  columns:
+    channel_id: required
+    reference__microephys: required
+    type__channels: required
+    units__channels: required
+    sampling_frequency: optional
+    channel_label: optional
+    stream_id: optional
+    description: optional
+    hardware_filters: recommended
+    software_filters: recommended
+    status: optional
+    status_description: optional
+    gain: recommended
+    time_offset: optional
+    time_reference_channel: optional
+    ground: optional
+    recording_mode: recommended
+  index_columns: [channel_id]
+  additional_columns: allowed_if_defined
diff --git a/src/schema/rules/tabular_data/task.yaml b/src/schema/rules/tabular_data/task.yaml
index 0ca01afe25..405a6d674b 100644
--- a/src/schema/rules/tabular_data/task.yaml
+++ b/src/schema/rules/tabular_data/task.yaml
@@ -15,6 +15,27 @@ TaskEvents:
       description_addendum: |
         Note that this column only applies to data types where
         channels are specified, such as EEG, iEEG, MEG or NIRS.
+# TODO: Make the addendums more clear and descriptive
+    data_entity_id:
+      level: optional
+      description_addendum: |
+        Note that this column only applies to
+        microelectrode eleectrophysiology data type.
+    duration_index:
+      level: optional
+      description_addendum: |
+        Note that this column only applies to
+        microelectrode eleectrophysiology data type.
+    onset_index:
+      level: optional
+      description_addendum: |
+        Note that this column only applies to
+        microelectrode eleectrophysiology data type.
+    trial_id:
+      level: optional
+      description_addendum: |
+        Note that this column only applies to
+        microelectrode eleectrophysiology data type.
   additional_columns: allowed
   initial_columns:
     - onset