diff --git a/docs/toardb_fastapi.md b/docs/toardb_fastapi.md
index 836ea8ec0d44f213c16865465c19c32ec8e059c1..fefb79486d57114e657b078925682effa5c1243a 100644
--- a/docs/toardb_fastapi.md
+++ b/docs/toardb_fastapi.md
@@ -178,7 +178,7 @@
 | rice_production_year2000 | number | Y2000 rice production amount at station location (units: thousand tons) (Reference: Dataset: http://gaez.fao.org/Main.html) | Yes |
 | edgar_htap_v2_nox_emissions_year2010 | number | EDGAR emissions inventory for nitrogen oxides (NOx) at 0.1° resolution (Reference: Janssens-Maenhout et al., 2015: http://edgar.jrc.ec.europa.eu/htap_v2/index.php?SECURE=123) | Yes |
 | omi_no2_column_years2011to2015 | number | Average Y2011-Y2015 tropospheric NO2 columns from OMI at 0.1 degree resolution in units of 10^15 molecules cm-2 (Reference: Krotkov et al., 2016: (no public download)) | Yes |
-| htap_region_tier1 | string | The integer denoting the “tier1” region defined in the task force on hemispheric transport of air pollution (TFHTAP) coordinated model studies | Yes |
+| htap_region_tier1 | string | The integer denoting the 'tier1' region defined in the task force on hemispheric transport of air pollution (TFHTAP) coordinated model studies | Yes |
 | etopo_alt | number | Global digital elevation model from diverse global and regional datasets in 1 arc minute resolution (Reference: Amante and Eakins, 2009: https://www.ngdc.noaa.gov/mgg/global/global.html) | Yes |
 | etopo_min_alt_5km | number | Minimum elevation from the ETOPO1 dataset in an area of 5 km radius around the station location. This can be used to find out if a high altitude station is located in mountaineous terrain or on a plateau (see etopo_relative_alt) | Yes |
 | etopo_relative_alt | number | Station elevation above the surrounding area. Derived by subtracting the minimum altitude within a 5 km radius around the station location from the actual station altitude | Yes |
diff --git a/toardb/data/models.py b/toardb/data/models.py
index 8b2ce7aa6b45d66863f0d32882b8b9a523336251..47428b3c3dfa9bdd34b32daaa0929c1ce81775a0 100644
--- a/toardb/data/models.py
+++ b/toardb/data/models.py
@@ -10,21 +10,22 @@ from toardb.base import Base
 
 
 class Data(Base):
-    """                         Table "public.data"  
+    """
+    Table "public.data"  
 
-    +---------------+--------------------------+-----------+----------+---------+
-    |Column         |Type                      |Collation  |Nullable  |Default  |
-    +===============+==========================+===========+==========+=========+
-    | datetime      | timestamp with time zone |           | not null |         |
-    +---------------+--------------------------+-----------+----------+---------+  
-    | value         | double precision         |           | not null |         |
-    +---------------+--------------------------+-----------+----------+---------+ 
-    | flags         | integer                  |           | not null |         |
-    +---------------+--------------------------+-----------+----------+---------+ 
+    +---------------+--------------------------+-----------+----------+----------------------------------------+
+    |Column         |Type                      |Collation  |Nullable  |Default                                 |
+    +===============+==========================+===========+==========+========================================+
+    | datetime      | timestamp with time zone |           | not null |                                        |
+    +---------------+--------------------------+-----------+----------+----------------------------------------+  
+    | value         | double precision         |           | not null |                                        |
+    +---------------+--------------------------+-----------+----------+----------------------------------------+ 
+    | flags         | integer                  |           | not null |                                        |
+    +---------------+--------------------------+-----------+----------+----------------------------------------+ 
     | version       | character(28)            |           | not null | '000001.000000.00000000000000'::bpchar |
-    +---------------+--------------------------+-----------+----------+---------+ 
-    | timeseries_id | integer                  |           | not null |         |
-    +---------------+--------------------------+-----------+----------+---------+ 
+    +---------------+--------------------------+-----------+----------+----------------------------------------+ 
+    | timeseries_id | integer                  |           | not null |                                        |
+    +---------------+--------------------------+-----------+----------+----------------------------------------+ 
 
     Indexes:  
      "data_pkey" PRIMARY KEY, btree (timeseries_id, datetime)  
@@ -53,21 +54,22 @@ class Data(Base):
     timeseries_id = Column(ForeignKey(Timeseries.id, deferrable=True, initially='DEFERRED'), nullable=False, index=True)
 
 class DataArchive(Base):
-    """                         Table "public.data_archive"  
+    """
+    Table "public.data_archive"  
 
-    +---------------+--------------------------+-----------+----------+---------+
-    |Column         |Type                      |Collation  |Nullable  |Default  |
-    +===============+==========================+===========+==========+=========+
-    | datetime      | timestamp with time zone |           | not null |         |
-    +---------------+--------------------------+-----------+----------+---------+  
-    | value         | double precision         |           | not null |         |
-    +---------------+--------------------------+-----------+----------+---------+ 
-    | flags         | integer                  |           | not null |         |
-    +---------------+--------------------------+-----------+----------+---------+ 
+    +---------------+--------------------------+-----------+----------+----------------------------------------+
+    |Column         |Type                      |Collation  |Nullable  |Default                                 |
+    +===============+==========================+===========+==========+========================================+
+    | datetime      | timestamp with time zone |           | not null |                                        |
+    +---------------+--------------------------+-----------+----------+----------------------------------------+  
+    | value         | double precision         |           | not null |                                        |
+    +---------------+--------------------------+-----------+----------+----------------------------------------+ 
+    | flags         | integer                  |           | not null |                                        |
+    +---------------+--------------------------+-----------+----------+----------------------------------------+ 
     | version       | character(28)            |           | not null | '000001.000000.00000000000000'::bpchar |
-    +---------------+--------------------------+-----------+----------+---------+ 
-    | timeseries_id | integer                  |           | not null |         |
-    +---------------+--------------------------+-----------+----------+---------+ 
+    +---------------+--------------------------+-----------+----------+----------------------------------------+ 
+    | timeseries_id | integer                  |           | not null |                                        |
+    +---------------+--------------------------+-----------+----------+----------------------------------------+ 
 
     Indexes:  
      "data_archive_pkey" PRIMARY KEY, btree (timeseries_id, datetime)  
diff --git a/toardb/stationmeta/models_annotation.py b/toardb/stationmeta/models_annotation.py
index 45bb9f355b13fb12b14509d9ad37aa4c793e8205..7b9d0baa6dec67adab2e790c9bff10b9b1d5995e 100644
--- a/toardb/stationmeta/models_annotation.py
+++ b/toardb/stationmeta/models_annotation.py
@@ -19,7 +19,8 @@ stationmeta_core_stationmeta_annotations_table = Table('stationmeta_core_station
 
 STATIONMETA_ANNOTATIONS_ID_SEQ = Sequence('stationmeta_annotations_id_seq')  # define sequence explicitly
 class StationmetaAnnotation(Base):
-    """ Table "public.stationmeta_annotations"
+    """
+    Table "public.stationmeta_annotations"
 
     +----------------+--------------------------+-----------+----------+--------------------------------------------------------+
     |     Column     |           Type           | Collation | Nullable |                      Default                           |
@@ -36,6 +37,7 @@ class StationmetaAnnotation(Base):
     +----------------+--------------------------+-----------+----------+--------------------------------------------------------+
     | contributor_id | integer                  |           | not null |                                                        |
     +----------------+--------------------------+-----------+----------+--------------------------------------------------------+
+
     Indexes:
      "stationmeta_annotations_pkey" PRIMARY KEY, btree (id)
      "stationmeta_annotations_contributor_id_a5009820" btree (contributor_id)
diff --git a/toardb/stationmeta/models_aux.py b/toardb/stationmeta/models_aux.py
index 52e96b92b826d4771813a214ef6c8aea0d1c97e1..57c88dac1722fa129eb4f385ec9c42d092655ca9 100644
--- a/toardb/stationmeta/models_aux.py
+++ b/toardb/stationmeta/models_aux.py
@@ -20,7 +20,8 @@ from toardb.base import Base
 
 STATIONMETA_AUX_DOC_ID_SEQ = Sequence('stationmeta_aux_doc_id_seq') #define sequence explicitly
 class StationmetaAuxDoc(Base):
-    """ Table "public.stationmeta_aux_doc"
+    """
+    Table "public.stationmeta_aux_doc"
 
     +----------------------+--------------------------+-----------+----------+-------------------------------------------------+
     |        Column        |           Type           | Collation | Nullable |                     Default                     |
@@ -35,6 +36,7 @@ class StationmetaAuxDoc(Base):
     +----------------------+--------------------------+-----------+----------+-------------------------------------------------+
     | station_id           | integer                  |           |          |                                                 |
     +----------------------+--------------------------+-----------+----------+-------------------------------------------------+
+
     Indexes:
      "stationmeta_aux_doc_pkey" PRIMARY KEY, btree (id)
      "stationmeta_aux_doc_station_id_17bdb5f2" btree (station_id)
@@ -55,7 +57,8 @@ class StationmetaAuxDoc(Base):
 
 STATIONMETA_AUX_IMAGE_ID_SEQ = Sequence('stationmeta_aux_image_id_seq') #define sequence explicitly
 class StationmetaAuxImage(Base):
-    """ Table "public.stationmeta_aux_image"
+    """
+    Table "public.stationmeta_aux_image"
 
     +----------------------+--------------------------+-----------+----------+---------------------------------------------------+
     |        Column        |           Type           | Collation | Nullable |                      Default                      |
@@ -74,6 +77,7 @@ class StationmetaAuxImage(Base):
     +----------------------+--------------------------+-----------+----------+---------------------------------------------------+
     | station_id           | integer                  |           |          |                                                   |
     +----------------------+--------------------------+-----------+----------+---------------------------------------------------+
+
     Indexes:
      "stationmeta_aux_image_pkey" PRIMARY KEY, btree (id)
      "stationmeta_aux_image_station_id_fbfbdb29" btree (station_id)
@@ -103,7 +107,8 @@ class StationmetaAuxImage(Base):
 
 STATIONMETA_AUX_URL_ID_SEQ = Sequence('stationmeta_aux_url_id_seq') #define sequence explicitly
 class StationmetaAuxUrl(Base):
-    """ Table "public.stationmeta_aux_url"
+    """
+    Table "public.stationmeta_aux_url"
 
     +----------------------+--------------------------+-----------+----------+-------------------------------------------------+
     |        Column        |           Type           | Collation | Nullable |                     Default                     |
@@ -118,6 +123,7 @@ class StationmetaAuxUrl(Base):
     +----------------------+--------------------------+-----------+----------+-------------------------------------------------+
     | station_id           | integer                  |           |          |                                                 |
     +----------------------+--------------------------+-----------+----------+-------------------------------------------------+
+
     Indexes:
      "stationmeta_aux_url_pkey" PRIMARY KEY, btree (id)
      "stationmeta_aux_url_station_id_727571bd" btree (station_id)
diff --git a/toardb/stationmeta/models_changelog.py b/toardb/stationmeta/models_changelog.py
index f380265642287e10a4a8b136c349c4bb0561c832..387c70abe9030f1578ff5925717c4c02a4e23031 100644
--- a/toardb/stationmeta/models_changelog.py
+++ b/toardb/stationmeta/models_changelog.py
@@ -11,7 +11,8 @@ from toardb.auth_user.models import AuthUser
 from toardb.base import Base
 
 class StationmetaChangelog(Base):
-    """ Table "public.stationmeta_changelog"
+    """
+    Table "public.stationmeta_changelog"
 
     +----------------+--------------------------+-----------+----------+--------------------------------------------------------+
     |     Column     |           Type           | Collation | Nullable |                      Default                           |
@@ -30,6 +31,7 @@ class StationmetaChangelog(Base):
     +----------------+--------------------------+-----------+----------+--------------------------------------------------------+
     | author_id      | integer                  |           | not null |                                                        |
     +----------------+--------------------------+-----------+----------+--------------------------------------------------------+
+
     Indexes:
      "timeseries_changelog_pkey" PRIMARY KEY, btree (datetime)
     Foreign-key constraints:
diff --git a/toardb/stationmeta/models_core.py b/toardb/stationmeta/models_core.py
index 0d598a848fbafbfc9aac39eab028967316f26d26..6a7115fc5bb5d6a2828d26c7f0a8828cb96c7eea 100644
--- a/toardb/stationmeta/models_core.py
+++ b/toardb/stationmeta/models_core.py
@@ -18,7 +18,8 @@ STATIONMETA_CORE_ID_SEQ = Sequence('stationmeta_core_id_seq')  # define sequence
 # still to be investigated!
 #   ValueError: [ValueError('dictionary update sequence element #0 has length 1; 2 is required',), TypeError('vars() argument must have __dict__ attribute',)]
 class StationmetaCore_WithoutCoords(Base):
-    """ Table "public.stationmeta_core"
+    """
+    Table "public.stationmeta_core"
 
     +------------------------------+--------------------------+-----------+----------+----------------------------------------------+
     |            Column            |           Type           | Collation | Nullable |                   Default                    |
@@ -45,6 +46,7 @@ class StationmetaCore_WithoutCoords(Base):
     +------------------------------+--------------------------+-----------+----------+----------------------------------------------+
     | additional_metadata          | jsonb                    |           | not null |                                              |
     +------------------------------+--------------------------+-----------+----------+----------------------------------------------+
+
     Indexes:
         "stationmeta_core_pkey" PRIMARY KEY, btree (id)
         "stationmeta_core_coordinates_id" gist (coordinates gist_geometry_ops_nd)
diff --git a/toardb/stationmeta/models_global.py b/toardb/stationmeta/models_global.py
index a740374c0c907b9b8ec70799cdf4e8c63c2c9f6f..14fc8b8bab609c532a58c55da1ff72ce65291830 100644
--- a/toardb/stationmeta/models_global.py
+++ b/toardb/stationmeta/models_global.py
@@ -13,7 +13,8 @@ from toardb.base import Base
 
 STATIONMETA_GLOBAL_ID_SEQ = Sequence('stationmeta_global_id_seq')  # define sequence explicitly
 class StationmetaGlobal(Base):
-    """ Table "public.stationmeta_global"
+    """
+    Table "public.stationmeta_global"
 
     +--------------------------------------+------------------+-----------+----------+------------------------------------------------+
     |                Column                |       Type       | Collation | Nullable |                    Default                     |
@@ -54,6 +55,7 @@ class StationmetaGlobal(Base):
     +--------------------------------------+------------------+-----------+----------+------------------------------------------------+
     | station_id                           | integer          |           | not null |                                                |
     +--------------------------------------+------------------+-----------+----------+------------------------------------------------+
+
     Indexes:
      "stationmeta_global_pkey" PRIMARY KEY, btree (id)
      "stationmeta_global_station_id_key" UNIQUE CONSTRAINT, btree (station_id)
diff --git a/toardb/stationmeta/models_global_services.py b/toardb/stationmeta/models_global_services.py
index 7813a4f82a7dd52a4cbe22e2352d2aaa2cf1baa7..2fdbcc0d6850b02da5f8c8372325e6ad54daa9ab 100644
--- a/toardb/stationmeta/models_global_services.py
+++ b/toardb/stationmeta/models_global_services.py
@@ -10,7 +10,8 @@ from toardb.base import Base
 
 STATIONMETA_GLOBAL_SERVICES_ID_SEQ = Sequence('stationmeta_global_services_id_seq')  # define sequence explicitly
 class StationmetaGlobalService(Base):
-    """ Table "public.stationmeta_global_services"
+    """
+    Table "public.stationmeta_global_services"
 
     +--------------------+------------------------+-----------+----------+---------------------------------------------------------+
     |       Column       |          Type          | Collation | Nullable |                         Default                         |
@@ -27,6 +28,7 @@ class StationmetaGlobalService(Base):
     +--------------------+------------------------+-----------+----------+---------------------------------------------------------+
     | service_url        | character varying(200) |           | not null |                                                         |
     +--------------------+------------------------+-----------+----------+---------------------------------------------------------+
+
     Indexes:
      "stationmeta_global_services_pkey" PRIMARY KEY, btree (id)
      "stationmeta_global_services_service_url_key" UNIQUE CONSTRAINT, btree (service_url)
diff --git a/toardb/stationmeta/models_role.py b/toardb/stationmeta/models_role.py
index 7d367e179c045b73bf63b05d64854a5828d90758..acd45d8a10b85dbafb82654229ff73f8089cdca1 100644
--- a/toardb/stationmeta/models_role.py
+++ b/toardb/stationmeta/models_role.py
@@ -19,7 +19,8 @@ stationmeta_core_stationmeta_roles_table = Table('stationmeta_core_stationmeta_r
 
 STATIONMETA_ROLES_ID_SEQ = Sequence('stationmeta_roles_id_seq')  # define sequence explicitly
 class StationmetaRole(Base):
-    """ Table "public.stationmeta_roles"
+    """
+    Table "public.stationmeta_roles"
 
     +------------+---------+-----------+----------+-----------------------------------------------+
     |   Column   |  Type   | Collation | Nullable |                  Default                      |
@@ -32,6 +33,7 @@ class StationmetaRole(Base):
     +------------+---------+-----------+----------+-----------------------------------------------+
     | contact_id | integer |           | not null |                                               |
     +------------+---------+-----------+----------+-----------------------------------------------+
+
     Indexes:
      "stationmeta_roles_pkey" PRIMARY KEY, btree (id)
      "stationmeta_roles_contact_id_3bd9c160" btree (contact_id)
diff --git a/toardb/stationmeta/schemas.py b/toardb/stationmeta/schemas.py
index 6e22677ebdfe283ecfb7f200a22a531c89977a40..c34dfdfc0bc8c0506b562ccac459d33a41a0cd03 100644
--- a/toardb/stationmeta/schemas.py
+++ b/toardb/stationmeta/schemas.py
@@ -295,7 +295,7 @@ class StationmetaGlobalBase(BaseModel):
     rice_production_year2000: float = Field(..., description="Y2000 rice production amount at station location (units: thousand tons) (Reference: Dataset: http://gaez.fao.org/Main.html)")
     edgar_htap_v2_nox_emissions_year2010: float = Field(..., description="EDGAR emissions inventory for nitrogen oxides (NOx) at 0.1° resolution (Reference: Janssens-Maenhout et al., 2015: http://edgar.jrc.ec.europa.eu/htap_v2/index.php?SECURE=123)")
     omi_no2_column_years2011to2015: float = Field(..., description="Average Y2011-Y2015 tropospheric NO2 columns from OMI at 0.1 degree resolution in units of 10^15 molecules cm-2 (Reference: Krotkov et al., 2016: (no public download))")
-    htap_region_tier1: str = Field(..., description="The integer denoting the “tier1” region defined in the task force on hemispheric transport of air pollution (TFHTAP) coordinated model studies")
+    htap_region_tier1: str = Field(..., description="The integer denoting the 'tier1' region defined in the task force on hemispheric transport of air pollution (TFHTAP) coordinated model studies")
     etopo_alt: float = Field(..., description="Global digital elevation model from diverse global and regional datasets in 1 arc minute resolution (Reference: Amante and Eakins, 2009: https://www.ngdc.noaa.gov/mgg/global/global.html)")
     etopo_min_alt_5km: float  = Field(..., description="Minimum elevation from the ETOPO1 dataset in an area of 5 km radius around the station location. This can be used to find out if a high altitude station is located in mountaineous terrain or on a plateau (see etopo_relative_alt)")
     etopo_relative_alt: float = Field(..., description="Station elevation above the surrounding area. Derived by subtracting the minimum altitude within a 5 km radius around the station location from the actual station altitude")
diff --git a/toardb/timeseries/models_annotation.py b/toardb/timeseries/models_annotation.py
index e24a9624a8e0209b50349c26e610fd07bfe047c3..ccec7bd923f9eef4eb4e563e29587dc2c551355a 100644
--- a/toardb/timeseries/models_annotation.py
+++ b/toardb/timeseries/models_annotation.py
@@ -18,7 +18,8 @@ timeseries_timeseries_annotations_table = Table('timeseries_timeseries_annotatio
 
 TIMESERIES_ANNOTATIONS_ID_SEQ = Sequence('timeseries_annotations_id_seq')  # define sequence explicitly
 class TimeseriesAnnotation(Base):
-    """ Table "public.timeseries_annotations"
+    """
+    Table "public.timeseries_annotations"
 
     +----------------+--------------------------+-----------+----------+----------------------------------------------------+
     |     Column     |           Type           | Collation | Nullable |                      Default                       |
@@ -35,6 +36,7 @@ class TimeseriesAnnotation(Base):
     +----------------+--------------------------+-----------+----------+----------------------------------------------------+
     | contributor_id | integer                  |           | not null |                                                    |
     +----------------+--------------------------+-----------+----------+----------------------------------------------------+
+
     Indexes:
         "timeseries_annotations_pkey" PRIMARY KEY, btree (id)
         "timeseries_annotations_contributor_id_7a1758f6" btree (contributor_id)
diff --git a/toardb/timeseries/models_changelog.py b/toardb/timeseries/models_changelog.py
index 6e97f382213207e49fe0aa4959da610e642d0bec..1c150db13635a79e850864fb30833b6735287df1 100644
--- a/toardb/timeseries/models_changelog.py
+++ b/toardb/timeseries/models_changelog.py
@@ -11,7 +11,8 @@ from toardb.auth_user.models import AuthUser
 from toardb.base import Base
 
 class TimeseriesChangelog(Base):
-    """ Table "public.timeseries_changelog"
+    """
+    Table "public.timeseries_changelog"
 
     +----------------+--------------------------+-----------+----------+--------------------------------------------------+
     |     Column     |           Type           | Collation | Nullable |                      Default                     |
@@ -36,6 +37,7 @@ class TimeseriesChangelog(Base):
     +----------------+--------------------------+-----------+----------+--------------------------------------------------+
     | author_id      | integer                  |           | not null |                                                  |
     +----------------+--------------------------+-----------+----------+--------------------------------------------------+
+
     Indexes:
      "timeseries_changelog_pkey" PRIMARY KEY, btree (datetime)
     Foreign-key constraints:
diff --git a/toardb/timeseries/models_core.py b/toardb/timeseries/models_core.py
index ea095e3c079ae18b0b0e85ed90a2c9a6600603c9..9668c38cc861be9884a46085f4aa610488c05a66 100644
--- a/toardb/timeseries/models_core.py
+++ b/toardb/timeseries/models_core.py
@@ -16,7 +16,8 @@ from toardb.base import Base
 
 TIMESERIES_ID_SEQ = Sequence('timeseries_id_seq')  # define sequence explicitly
 class Timeseries(Base):
-    """ Table "public.timeseries"
+    """
+    Table "public.timeseries"
 
     +---------------------+--------------------------+-----------+----------+----------------------------------------+
     |       Column        |           Type           | Collation | Nullable |                Default                 |
@@ -55,6 +56,7 @@ class Timeseries(Base):
     +---------------------+--------------------------+-----------+----------+----------------------------------------+
     | programme_id        | integer                  |           | not null | 0                                      |
     +---------------------+--------------------------+-----------+----------+----------------------------------------+
+
     Indexes:
         "timeseries_pkey" PRIMARY KEY, btree (id)
         "timeseries_station_id_variable_id_label_uniq" UNIQUE CONSTRAINT, btree (station_id, variable_id, label)
diff --git a/toardb/timeseries/models_programme.py b/toardb/timeseries/models_programme.py
index cb5b40084b3f7d08c62c1e8ef9de55c7fe9a802b..60056a4b27076c1acf6c91678418b1bc0c48716a 100644
--- a/toardb/timeseries/models_programme.py
+++ b/toardb/timeseries/models_programme.py
@@ -9,7 +9,8 @@ from toardb.base import Base
 
 TIMESERIES_PROGRAMMES_ID_SEQ = Sequence('timeseries_programmes_id_seq')  # define sequence explicitly
 class TimeseriesProgramme(Base):
-    """ Table "public.timeseries_programmes"
+    """
+    Table "public.timeseries_programmes"
 
     +-------------+------------------------+-----------+----------+---------------------------------------------------+
     |  Column     |          Type          | Collation | Nullable |                      Default                      |
diff --git a/toardb/timeseries/models_role.py b/toardb/timeseries/models_role.py
index 6d3d53a702c6a98977ac65650db3cc1c684fd4c3..35ee72a70ec0a6680f682353a0c6aba1f10ef4d8 100644
--- a/toardb/timeseries/models_role.py
+++ b/toardb/timeseries/models_role.py
@@ -19,7 +19,8 @@ timeseries_timeseries_roles_table = Table('timeseries_timeseries_roles', Base.me
 
 TIMESERIES_ROLES_ID_SEQ = Sequence('timeseries_roles_id_seq')  # define sequence explicitly
 class TimeseriesRole(Base):
-    """ Table "public.timeseries_roles"
+    """
+    Table "public.timeseries_roles"
 
     +---------------+---------+-----------+----------+----------------------------------------------+
     |    Column     |  Type   | Collation | Nullable |                   Default                    |
@@ -32,6 +33,7 @@ class TimeseriesRole(Base):
     +---------------+---------+-----------+----------+----------------------------------------------+
     | contact_id    | integer |           | not null |                                              |
     +---------------+---------+-----------+----------+----------------------------------------------+
+
     Indexes:
         "timeseries_roles_pkey" PRIMARY KEY, btree (id)
         "timeseries_roles_role_status_contact_id_uniq" UNIQUE CONSTRAINT, btree (role, status, contact_id)
diff --git a/toardb/variables/models.py b/toardb/variables/models.py
index 7e2cb505cb8ba97e822bd94efd35702bb0c19086..da657f0eef16cd0a637d47817846e0f04af1fe4d 100644
--- a/toardb/variables/models.py
+++ b/toardb/variables/models.py
@@ -8,7 +8,8 @@ from toardb.base import Base
 
 VARIABLES_ID_SEQ = Sequence('variables_id_seq')  # define sequence explicitly
 class Variable(Base):
-    """ Table "public.variables"
+    """
+    Table "public.variables"
 
     +------------------+------------------------+-----------+----------+---------------------------------------+
     |     Column       |          Type          | Collation | Nullable |                Default                |
@@ -27,6 +28,7 @@ class Variable(Base):
     +------------------+------------------------+-----------+----------+---------------------------------------+
     | chemical_formula | character varying(128) |           | not null |                                       |
     +------------------+------------------------+-----------+----------+---------------------------------------+
+
     Indexes:
         "variables_pkey" PRIMARY KEY, btree (id)
         "variables_name_key" UNIQUE CONSTRAINT, btree (name)