diff --git a/src/modb.c b/src/modb.c
new file mode 100644
index 0000000..f8d7926
--- /dev/null
+++ b/src/modb.c
@@ -0,0 +1,125 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+#include "modb.h"
+#include "modb_p.h"
+#include "db_query.h"
+#include "strext.h"
+
+
+int modbCreate(struct stored_conn_t *sconn, struct modb_t *modb)
+{
+  if (createSysTable(sconn, modb) == (uint64_t)-1) {
+    return -1;
+  }
+  if (createMetaTable(sconn, modb) == (uint64_t)-1) {
+    destroyTable(sconn, modb, SYS_TABLE, STR_LEN(SYS_TABLE));
+    return -1;
+  }
+  if (createObjectsTable(sconn, modb) == (uint64_t)-1) {
+    destroyTable(sconn, modb, META_TABLE, STR_LEN(META_TABLE));
+    destroyTable(sconn, modb, SYS_TABLE, STR_LEN(SYS_TABLE));
+    return -1;
+  }
+  if (createMDOGroupsTable(sconn, modb) == (uint64_t)-1) {
+    destroyTable(sconn, modb, OBJECTS_TABLE, STR_LEN(OBJECTS_TABLE));
+    destroyTable(sconn, modb, META_TABLE, STR_LEN(META_TABLE));
+    destroyTable(sconn, modb, SYS_TABLE, STR_LEN(SYS_TABLE));
+    return -1;
+  }
+
+  return 0;
+}
+int modbExists(struct stored_conn_t *sconn, struct modb_t *modb)
+{
+  return tableExists(sconn, modb, META_TABLE, STR_LEN(META_TABLE));
+}
+int modbDestroy(struct stored_conn_t *sconn, struct modb_t *modb)
+{
+  int err = 0
+      || destroyTable(sconn, modb, MDO_GROUPS_TABLE, STR_LEN(MDO_GROUPS_TABLE))
+      || destroyTable(sconn, modb, OBJECTS_TABLE, STR_LEN(OBJECTS_TABLE))
+      || destroyTable(sconn, modb, META_TABLE, STR_LEN(META_TABLE))
+      || destroyTable(sconn, modb, SYS_TABLE, STR_LEN(SYS_TABLE));
+  return err == 0;
+}
+
+int modbAccountingCreate(struct stored_conn_t *sconn, struct modb_t *modb)
+{
+  if (createOwnersTable(sconn, modb) == (uint64_t)-1) {
+    return -1;
+  }
+  if (createGroupsTable(sconn, modb) == (uint64_t)-1) {
+    destroyTable(sconn, modb, OWNERS_TABLE, STR_LEN(OWNERS_TABLE));
+    return -1;
+  }
+  if (createOwnerGroupsTable(sconn, modb) == (uint64_t)-1) {
+    destroyTable(sconn, modb, GROUPS_TABLE, STR_LEN(GROUPS_TABLE));
+    destroyTable(sconn, modb, OWNERS_TABLE, STR_LEN(OWNERS_TABLE));
+    return -1;
+  }
+
+  return 0;
+}
+int modbAccountingExists(struct stored_conn_t *sconn, struct modb_t *modb)
+{
+  return tableExists(sconn, modb, OWNERS_TABLE, STR_LEN(OWNERS_TABLE));
+}
+int modbAccountingDestroy(struct stored_conn_t *sconn, struct modb_t *modb)
+{
+  int err = 0
+      || destroyTable(sconn, modb, OWNER_GROUPS_TABLE, STR_LEN(OWNER_GROUPS_TABLE))
+      || destroyTable(sconn, modb, GROUPS_TABLE, STR_LEN(GROUPS_TABLE))
+      || destroyTable(sconn, modb, OWNERS_TABLE, STR_LEN(OWNERS_TABLE));
+  return err;
+}
+
+int modbMetaExtCreate(struct stored_conn_t *sconn, struct modb_t *modb,
+                      struct column_data_t **col_data, size_t cols)
+{
+  char *qry;
+  uint64_t res;
+  size_t qry_len;
+  str_builder *sb;
+  char *colstr;
+
+  if ((sb = strbld_create()) == 0) {
+    return -1;
+  }
+  strbld_str(sb, "CREATE TABLE `", 0);
+  strbld_str(sb, modb->name, modb->name_len);
+  strbld_str(sb, META_EXT_TABLE, STR_LEN(META_EXT_TABLE));
+  strbld_str(sb, "` ", 2);
+  strbld_str(sb, "(", 1);
+  strbld_str(sb, "`mdo_id` INT UNSIGNED NOT NULL", 0);
+  for (size_t c = 0; c < cols; c++) {
+    struct column_data_t *col = *(col_data + c);
+    if ((colstr = createColString(col)) == 0) {
+      strbld_destroy(&sb);
+      return -1;
+    }
+    strbld_str(sb, colstr, 0);
+    free(colstr);
+  }
+  strbld_str(sb, ", INDEX (`mdo_id`))", 0);
+  if (strbld_finalize_or_destroy(&sb, &qry, &qry_len) != 0) {
+    return -1;
+  }
+
+  res = simpleQuery(sconn, qry, qry_len);
+  free(qry);
+
+  return (res == (uint64_t)-1) ? -1 : (int)res;
+}
+int modbMetaExtExists(struct stored_conn_t *sconn, struct modb_t *modb)
+{
+  return tableExists(sconn, modb, META_EXT_TABLE, STR_LEN(META_EXT_TABLE));
+}
+int modbMetaExtDestroy(struct stored_conn_t *sconn, struct modb_t *modb)
+{
+  int err = 0
+      || destroyTable(sconn, modb, META_EXT_TABLE, STR_LEN(META_EXT_TABLE));
+  return err;
+}
diff --git a/src/modb.h b/src/modb.h
new file mode 100644
index 0000000..db628a4
--- /dev/null
+++ b/src/modb.h
@@ -0,0 +1,22 @@
+#ifndef H__MODB__
+#define H__MODB__
+
+#include "db_connection.h"
+#include "db_column.h"
+#include "modb_types.h"
+
+
+int modbCreate(struct stored_conn_t *sconn, struct modb_t *modb);
+int modbExists(struct stored_conn_t *sconn, struct modb_t *modb);
+int modbDestroy(struct stored_conn_t *sconn, struct modb_t *modb);
+
+int modbAccountingCreate(struct stored_conn_t *sconn, struct modb_t *modb);
+int modbAccountingExists(struct stored_conn_t *sconn, struct modb_t *modb);
+int modbAccountingDestroy(struct stored_conn_t *sconn, struct modb_t *modb);
+
+int modbMetaExtCreate(struct stored_conn_t *sconn, struct modb_t *modb,
+                      struct column_data_t **col_data, size_t cols);
+int modbMetaExtExists(struct stored_conn_t *sconn, struct modb_t *modb);
+int modbMetaExtDestroy(struct stored_conn_t *sconn, struct modb_t *modb);
+
+#endif // H__MODB__
diff --git a/src/modb_p.c b/src/modb_p.c
new file mode 100644
index 0000000..8b9281a
--- /dev/null
+++ b/src/modb_p.c
@@ -0,0 +1,349 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+#include "modb_p.h"
+#include "db_query.h"
+#include "strext.h"
+
+
+uint64_t createSysTable(struct stored_conn_t *sconn, struct modb_t *modb)
+{
+  char *qry;
+  uint64_t res;
+  size_t qry_len;
+  str_builder *sb;
+
+  if ((sb = strbld_create()) == 0) {
+    return (uint64_t)-1;
+  }
+  strbld_str(sb, "CREATE TABLE `", 0);
+  strbld_str(sb, modb->name, modb->name_len);
+  strbld_str(sb, SYS_TABLE, STR_LEN(SYS_TABLE));
+  strbld_str(sb, "` ", 2);
+  strbld_str(sb, "("
+                 "`key` VARCHAR(255) NULL, "
+                 "`value` VARCHAR(255) NULL, "
+                 "UNIQUE(`key`)"
+                 ")", 0);
+  if (strbld_finalize_or_destroy(&sb, &qry, &qry_len) != 0) {
+    return (uint64_t)-1;
+  }
+
+  res = simpleQuery(sconn, qry, qry_len);
+  free(qry);
+
+  return res;
+}
+uint64_t createMetaTable(struct stored_conn_t *sconn, struct modb_t *modb)
+{
+  char *qry;
+  uint64_t res;
+  size_t qry_len;
+  str_builder *sb;
+
+  if ((sb = strbld_create()) == 0) {
+    return (uint64_t)-1;
+  }
+  strbld_str(sb, "CREATE TABLE `", 0);
+  strbld_str(sb, modb->name, modb->name_len);
+  strbld_str(sb, META_TABLE, STR_LEN(META_TABLE));
+  strbld_str(sb, "` ", 2);
+  strbld_str(sb, "("
+                 "`mdo_id` INT UNSIGNED NOT NULL AUTO_INCREMENT, "
+                 "`title` VARCHAR(255) NOT NULL, "
+                 "`owner` INT UNSIGNED NOT NULL, "
+                 "`created` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP, "
+                 "`updated` TIMESTAMP on update CURRENT_TIMESTAMP NULL DEFAULT NULL, "
+                 "`deleted` TIMESTAMP NULL DEFAULT NULL, "
+                 "PRIMARY KEY(`mdo_id`)"
+                 ")", 0);
+  if (strbld_finalize_or_destroy(&sb, &qry, &qry_len) != 0) {
+    return (uint64_t)-1;
+  }
+
+  res = simpleQuery(sconn, qry, qry_len);
+  free(qry);
+
+  return res;
+}
+uint64_t createObjectsTable(struct stored_conn_t *sconn, struct modb_t *modb)
+{
+  char *qry;
+  uint64_t res;
+  size_t qry_len;
+  str_builder *sb;
+
+  if ((sb = strbld_create()) == 0) {
+    return (uint64_t)-1;
+  }
+  strbld_str(sb, "CREATE TABLE `", 0);
+  strbld_str(sb, modb->name, modb->name_len);
+  strbld_str(sb, OBJECTS_TABLE, STR_LEN(OBJECTS_TABLE));
+  strbld_str(sb, "` ", 2);
+  strbld_str(sb, "("
+                 "`mdo_id` INT UNSIGNED NOT NULL, "
+                 "`object` MEDIUMBLOB NOT NULL, "
+                 "PRIMARY KEY (`mdo_id`)"
+                 ")", 0);
+  if (strbld_finalize_or_destroy(&sb, &qry, &qry_len) != 0) {
+    return (uint64_t)-1;
+  }
+
+  res = simpleQuery(sconn, qry, qry_len);
+  free(qry);
+
+  return res;
+}
+uint64_t createMDOGroupsTable(struct stored_conn_t *sconn, struct modb_t *modb)
+{
+  char *qry;
+  uint64_t res;
+  size_t qry_len;
+  str_builder *sb;
+
+  if ((sb = strbld_create()) == 0) {
+    return (uint64_t)-1;
+  }
+  strbld_str(sb, "CREATE TABLE `", 0);
+  strbld_str(sb, modb->name, modb->name_len);
+  strbld_str(sb, MDO_GROUPS_TABLE, STR_LEN(MDO_GROUPS_TABLE));
+  strbld_str(sb, "` ", 2);
+  strbld_str(sb, "("
+                 "`mdo_id` INT UNSIGNED NOT NULL, "
+                 "`group_id` INT UNSIGNED NOT NULL, "
+                 "INDEX(`mdo_id`), "
+                 "INDEX(`group_id`)"
+                 ")", 0);
+  if (strbld_finalize_or_destroy(&sb, &qry, &qry_len) != 0) {
+    return (uint64_t)-1;
+  }
+
+  res = simpleQuery(sconn, qry, qry_len);
+  free(qry);
+
+  return res;
+}
+
+uint64_t createOwnersTable(struct stored_conn_t *sconn, struct modb_t *modb)
+{
+  char *qry;
+  uint64_t res;
+  size_t qry_len;
+  str_builder *sb;
+
+  if ((sb = strbld_create()) == 0) {
+    return (uint64_t)-1;
+  }
+  strbld_str(sb, "CREATE TABLE `", 0);
+  strbld_str(sb, modb->name, modb->name_len);
+  strbld_str(sb, OWNERS_TABLE, STR_LEN(OWNERS_TABLE));
+  strbld_str(sb, "` ", 2);
+  strbld_str(sb, "("
+                 "`id` INT UNSIGNED NOT NULL, "
+                 "`username` VARCHAR(255) NOT NULL, "
+                 "`email` VARCHAR(255) NOT NULL, "
+                 "`created` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP, "
+                 "`updated` TIMESTAMP on update CURRENT_TIMESTAMP NULL DEFAULT NULL, "
+                 "`deleted` TIMESTAMP NULL DEFAULT NULL, "
+                 "INDEX (`id`)"
+                 ")", 0);
+  if (strbld_finalize_or_destroy(&sb, &qry, &qry_len) != 0) {
+    return (uint64_t)-1;
+  }
+
+  res = simpleQuery(sconn, qry, qry_len);
+  free(qry);
+
+  return res;
+}
+uint64_t createGroupsTable(struct stored_conn_t *sconn, struct modb_t *modb)
+{
+  char *qry;
+  uint64_t res;
+  size_t qry_len;
+  str_builder *sb;
+
+  if ((sb = strbld_create()) == 0) {
+    return (uint64_t)-1;
+  }
+  strbld_str(sb, "CREATE TABLE `", 0);
+  strbld_str(sb, modb->name, modb->name_len);
+  strbld_str(sb, GROUPS_TABLE, STR_LEN(GROUPS_TABLE));
+  strbld_str(sb, "` ", 2);
+  strbld_str(sb, "("
+                 "`id` INT UNSIGNED NOT NULL, "
+                 "`name` VARCHAR(255) NOT NULL, "
+                 "`created` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP, "
+                 "`updated` TIMESTAMP on update CURRENT_TIMESTAMP NULL DEFAULT NULL, "
+                 "`deleted` TIMESTAMP NULL DEFAULT NULL, "
+                 "INDEX (`id`)"
+                 ")", 0);
+  if (strbld_finalize_or_destroy(&sb, &qry, &qry_len) != 0) {
+    return (uint64_t)-1;
+  }
+
+  res = simpleQuery(sconn, qry, qry_len);
+  free(qry);
+
+  return res;
+}
+uint64_t createOwnerGroupsTable(struct stored_conn_t *sconn, struct modb_t *modb)
+{
+  char *qry;
+  uint64_t res;
+  size_t qry_len;
+  str_builder *sb;
+
+  if ((sb = strbld_create()) == 0) {
+    return (uint64_t)-1;
+  }
+  strbld_str(sb, "CREATE TABLE `", 0);
+  strbld_str(sb, modb->name, modb->name_len);
+  strbld_str(sb, OWNER_GROUPS_TABLE, STR_LEN(OWNER_GROUPS_TABLE));
+  strbld_str(sb, "` ", 2);
+  strbld_str(sb, "("
+                 "`owner_id` INT UNSIGNED NOT NULL, "
+                 "`group_id` INT UNSIGNED NOT NULL, "
+                 "INDEX(`owner_id`), "
+                 "INDEX(`group_id`)"
+                 ")", 0);
+  if (strbld_finalize_or_destroy(&sb, &qry, &qry_len) != 0) {
+    return (uint64_t)-1;
+  }
+
+  res = simpleQuery(sconn, qry, qry_len);
+  free(qry);
+
+  return res;
+}
+
+int tableExists(struct stored_conn_t *sconn, struct modb_t *modb,
+                const char *suffix, size_t suffix_len)
+{
+  char *qry, *res;
+  size_t qry_len;
+  str_builder *sb;
+  int retval = 0;
+
+  if ((sb = strbld_create()) == 0) {
+    return -errno;
+  }
+  retval += strbld_str(sb, "SHOW TABLES LIKE '", 0);
+  retval += strbld_str(sb, modb->name, modb->name_len);
+  retval += strbld_str(sb, suffix, suffix_len);
+  retval += strbld_char(sb, '\'');
+  if (strbld_finalize_or_destroy(&sb, &qry, &qry_len) != 0) {
+    return -errno;
+  }
+
+  res = scalarString(sconn, qry, qry_len, "Z");
+  if (res == 0 || strncmp(res, "Z", 1) == 0 || strlen(res) != modb->name_len) {
+    retval = -1;
+  } else {
+    retval = strncmp(res, modb->name, modb->name_len) == 0;
+  }
+
+  if (res != 0) {
+    free(res);
+  }
+  free(qry);
+
+  return retval;
+}
+
+uint64_t destroyTable(struct stored_conn_t *sconn, struct modb_t *modb,
+                      const char *suffix, size_t suffix_len)
+{
+  char *qry;
+  uint64_t res;
+  size_t qry_len;
+  str_builder *sb;
+
+  if ((sb = strbld_create()) == 0) {
+    return (uint64_t)-1;
+  }
+  strbld_str(sb, "DROP TABLE `", 0);
+  strbld_str(sb, modb->name, modb->name_len);
+  strbld_str(sb, suffix, suffix_len);
+  strbld_str(sb, "` ", 2);
+  if (strbld_finalize_or_destroy(&sb, &qry, &qry_len) != 0) {
+    return (uint64_t)-1;
+  }
+
+  res = simpleQuery(sconn, qry, qry_len);
+  free(qry);
+
+  return res;
+}
+
+char *createColString(struct column_data_t *col)
+{
+  char *colstr;
+  size_t colstr_len;
+  str_builder *sb;
+
+  if ((sb = strbld_create()) == 0) {
+    return 0;
+  }
+  strbld_str(sb, ", `", 3);
+  strbld_str(sb, col->name, col->name_len);
+  strbld_str(sb, "` ", 2);
+
+  switch(col->type) {
+    case TYPE_RAW:
+      strbld_str(sb, "MEDIUMBLOB", 10);
+      break;
+    case TYPE_BOOL:
+      strbld_str(sb, "BOOLEAN", 7);
+      break;
+    case TYPE_INT8:
+    case TYPE_UINT8:
+      strbld_str(sb, "TINYINT", 7);
+      break;
+    case TYPE_INT16:
+    case TYPE_UINT16:
+      strbld_str(sb, "SMALLINT", 8);
+      break;
+    case TYPE_INT32:
+    case TYPE_UINT32:
+      strbld_str(sb, "INT", 3);
+      break;
+    case TYPE_INT64:
+    case TYPE_UINT64:
+      strbld_str(sb, "BIGINT", 6);
+      break;
+    case TYPE_FLOAT:
+      strbld_str(sb, "FLOAT", 5);
+      break;
+    case TYPE_DOUBLE:
+      strbld_str(sb, "DOUBLE", 6);
+      break;
+    case TYPE_STRING:
+      strbld_str(sb, "VARCHAR(4096)", 13);
+      break;
+    case TYPE_BLOB:
+      strbld_str(sb, "MEDIUMBLOB", 10);
+      break;
+    case TYPE_TIMESTAMP:
+      strbld_str(sb, "TIMESTAMP", 8);
+  }
+
+  if (col->isUnsigned) {
+    strbld_str(sb, " UNSIGNED", 0);
+  }
+
+  if (col->isNullable) {
+    strbld_str(sb, " NOT NULL", 0);
+  } else {
+    strbld_str(sb, " NULL", 0);
+  }
+
+  if (strbld_finalize_or_destroy(&sb, &colstr, &colstr_len) != 0) {
+    return 0;
+  }
+
+  return colstr;
+}
+
diff --git a/src/modb_p.h b/src/modb_p.h
new file mode 100644
index 0000000..538b9de
--- /dev/null
+++ b/src/modb_p.h
@@ -0,0 +1,41 @@
+#ifndef H__MODB_P__
+#define H__MODB_P__
+
+#include <stdint.h>
+#include <stddef.h>
+
+#include "db_connection.h"
+#include "db_column.h"
+#include "modb_types.h"
+
+
+#define SYS_TABLE "_sys"
+#define META_TABLE "_meta"
+#define OBJECTS_TABLE "_objects"
+#define MDO_GROUPS_TABLE "_mdo_groups"
+
+#define OWNERS_TABLE "_owner"
+#define GROUPS_TABLE "_groups"
+#define OWNER_GROUPS_TABLE "_owner_groups"
+
+#define META_EXT_TABLE "_meta_ext"
+
+
+uint64_t createSysTable(struct stored_conn_t *sconn, struct modb_t *modb);
+uint64_t createMetaTable(struct stored_conn_t *sconn, struct modb_t *modb);
+uint64_t createObjectsTable(struct stored_conn_t *sconn, struct modb_t *modb);
+uint64_t createMDOGroupsTable(struct stored_conn_t *sconn, struct modb_t *modb);
+
+uint64_t createOwnersTable(struct stored_conn_t *sconn, struct modb_t *modb);
+uint64_t createGroupsTable(struct stored_conn_t *sconn, struct modb_t *modb);
+uint64_t createOwnerGroupsTable(struct stored_conn_t *sconn, struct modb_t *modb);
+
+int tableExists(struct stored_conn_t *sconn, struct modb_t *modb,
+                const char *suffix, size_t suffix_len);
+
+uint64_t destroyTable(struct stored_conn_t *sconn, struct modb_t *modb,
+                      const char *suffix, size_t suffix_len);
+
+char *createColString(struct column_data_t *col);
+
+#endif // H__MODB_P__
diff --git a/src/modb_types.c b/src/modb_types.c
new file mode 100644
index 0000000..7992823
--- /dev/null
+++ b/src/modb_types.c
@@ -0,0 +1,34 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+#include "modb_types.h"
+#include "strext.h"
+
+
+struct modb_t *modbAlloc(const char *name, size_t name_len)
+{
+  struct modb_t *modb = (struct modb_t *)malloc(sizeof(struct modb_t));
+  if (modb == 0) {
+    fprintf(stderr, "[%d]malloc: (%d) %s\n", __LINE__, errno, strerror(errno));
+    return 0;
+  }
+
+  if (strmemcpy(name, name_len, &modb->name, &modb->name_len) != 0) {
+    modbRelease(&modb);
+    return 0;
+  }
+
+  return modb;
+}
+void modbRelease(struct modb_t **modb)
+{
+  if ((*modb)->name != 0) {
+    free((*modb)->name);
+    (*modb)->name = 0;
+  }
+
+  free(*modb);
+  *modb = 0;
+}
diff --git a/src/modb_types.h b/src/modb_types.h
new file mode 100644
index 0000000..65f4257
--- /dev/null
+++ b/src/modb_types.h
@@ -0,0 +1,15 @@
+#ifndef H__MODB_TYPES__
+#define H__MODB_TYPES__
+
+#include <stddef.h>
+#include <stdint.h>
+
+struct modb_t {
+  char *name;
+  size_t name_len;
+};
+
+struct modb_t *modbAlloc(const char *name, size_t name_len);
+void modbRelease(struct modb_t **modb);
+
+#endif // H__MODB_TYPES__