| Tree | Name | URN |
| Domain.539.001.001 | Verticals | urn:lex:us: |
| Domain.539.001.002 | SLG Communities of Services (COS) | urn:lex:us:slg.cos: |
| Domain.539.001.012 | eGov | urn:lex:us:egov: |
| Domain.539.001.013 | Lex | urn:lex:us:lex: |
| Domain.539.002.003 | COS Federal | urn:lex:us:slg.cos:federal: |
| Domain.539.002.004 | COS State | urn:lex:us:slg.cos:state: |
| Domain.539.002.005 | COS Local | urn:lex:us:slg.cos:local: |
| Domain.539.002.006 | COS Private Sector | urn:lex:us:slg.cos:private.sector: |
| Domain.539.002.007 | COS Non-Governnent Organizations | urn:lex:us:slg.cos:ngo: |
| Domain.539.002.008 | COS Academia | urn:lex:us:slg.cos:academia: |
| Domain.539.002.009 | COS Tribal | urn:lex:us:slg.cos:tribal: |
| Domain.539.002.010 | COS Regional | urn:lex:us:slg.cos:regional: |
| Domain.539.002.011 | COS International | urn:lex:us:slg.cos:international: |
| Domain.539.013.014 | Externals and Separate Entries | urn:lex:us:externals.and.separate.entries:lex: |
| Domain.539.013.015 | Internals | urn:lex:us:internals:lex: |
| Domain.539.014.056 | American Samoa;separate.entry.as | urn:lex:us;american.samoa:separate.entry.as: |
| Domain.539.014.057 | Guam;separate.entry.gu | urn:lex:us;guam:separate.entry.gu: |
| Domain.539.014.058 | Northern Mariana Islands;separate.entry.mp | urn:lex:us;northern.mariana.islands:separate.entry.mp: |
| Domain.539.014.059 | Puerto Rico;separate.entry.pr | urn:lex:us;puerto.rico:separate.entry.pr: |
| Domain.539.014.060 | Virgin Islands of the US;separate.entry.vi | urn:lex:us;virgin.islands.of.the.us:separate.entry.vi: |
| Domain.539.014.061 | US Minor Outlying Islands;seperate.entry.um | urn:lex:us;us.minor.outlying.islands:seperate.entry.um: |
| Domain.539.014.066 | Baker Island (Pacific);US Minor Outlying Islands | urn:lex:us;us.minor.outlying.islands;baker.island:external: |
| Domain.539.014.067 | Howland Island (Pacific);US Minor Outlying Islands | urn:lex:us;us.minor.outlying.islands;howland.island:external: |
| Domain.539.014.068 | Jarvis Island (Pacific);US Minor Outlying Islands | urn:lex:us;us.minor.outlying.islands;jarvis.island:external: |
| Domain.539.014.069 | Johnston Atoll (Pacific);US Minor Outlying Islands | urn:lex:us;us.minor.outlying.islands;johnston.atoll:external: |
| Domain.539.014.070 | Kingman Reef (Pacific);US Minor Outlying Islands | urn:lex:us;us.minor.outlying.islands;kingman.reef:external: |
| Domain.539.014.071 | Midway Islands (Pacific);US Minor Outlying Islands | urn:lex:us;us.minor.outlying.islands;midway.islands:external: |
| Domain.539.014.072 | Navassa Island (Caribbean);US Minor Outlying Islands | urn:lex:us;us.minor.outlying.islands;navassa.island:external: |
| Domain.539.014.073 | Palmyra Atoll (Pacific);US Minor Outlying Islands | urn:lex:us;us.minor.outlying.islands;palmyra.atoll:external: |
| Domain.539.014.074 | Wake Island (Pacific);US Minor Outlying Islands | urn:lex:us;us.minor.outlying.islands;wake.island:external: |
| Domain.539.015.016 | Alabama | urn:lex:us;alabama:internal: |
| Domain.539.015.017 | Alaska | urn:lex:us;alaska:internal: |
| Domain.539.015.018 | Arizona | urn:lex:us;arizona:internal: |
| Domain.539.015.019 | Arkansas | urn:lex:us;arkansas:internal: |
| Domain.539.015.020 | California | urn:lex:us;california:internal: |
| Domain.539.015.021 | Colorado | urn:lex:us;colorado:internal: |
| Domain.539.015.022 | Connecticut | urn:lex:us;connecticut:internal: |
| Domain.539.015.023 | Delaware | urn:lex:us;delaware:internal: |
| Domain.539.015.024 | District of Columbia | urn:lex:us;district.of.columbia:internal: |
| Domain.539.015.025 | Florida | urn:lex:us;florida:internal: |
| Domain.539.015.026 | Georgia | urn:lex:us;georgia:internal: |
| Domain.539.015.027 | Hawaii | urn:lex:us;hawaii:internal: |
| Domain.539.015.028 | Idaho | urn:lex:us;idaho:internal: |
| Domain.539.015.029 | Illinois | urn:lex:us;illinois:internal: |
| Domain.539.015.030 | Indiana | urn:lex:us;indiana:internal: |
| Domain.539.015.031 | Iowa | urn:lex:us;iowa:internal: |
| Domain.539.015.032 | Kansas | urn:lex:us;kansas:internal: |
| Domain.539.015.033 | Kentucky | urn:lex:us;kentucky:internal: |
| Domain.539.015.034 | Louisiana | urn:lex:us;louisiana:internal: |
| Domain.539.015.035 | Maine | urn:lex:us;maine:internal: |
| Domain.539.015.036 | Maryland | urn:lex:us;maryland:internal: |
| Domain.539.015.037 | Massachusetts | urn:lex:us;massachusetts:internal: |
| Domain.539.015.038 | Michigan | urn:lex:us;michigan:internal: |
| Domain.539.015.039 | Minnesota | urn:lex:us;minnesota:internal: |
| Domain.539.015.040 | Mississippi | urn:lex:us;mississippi:internal: |
| Domain.539.015.041 | Missouri | urn:lex:us;missouri:internal: |
| Domain.539.015.042 | Montana | urn:lex:us;montana:internal: |
| Domain.539.015.043 | Nebraska | urn:lex:us;nebraska:internal: |
| Domain.539.015.044 | Nevada | urn:lex:us;nevada:internal: |
| Domain.539.015.045 | New Hampshire | urn:lex:us;new.hampshire:internal: |
| Domain.539.015.046 | New Jersey | urn:lex:us;new.jersey:internal: |
| Domain.539.015.047 | New Mexico | urn:lex:us;new.mexico:internal: |
| Domain.539.015.048 | New York | urn:lex:us;new.york:internal: |
| Domain.539.015.049 | North Carolina | urn:lex:us;north.carolina:internal: |
| Domain.539.015.050 | North Dakota | urn:lex:us;north.dakota:internal: |
| Domain.539.015.051 | Ohio | urn:lex:us;ohio:internal: |
| Domain.539.015.052 | Oklahoma | urn:lex:us;oklahoma:internal: |
| Domain.539.015.053 | Oregon | urn:lex:us;oregon:internal: |
| Domain.539.015.054 | Pennsylvania | urn:lex:us;pennsylvania:internal: |
| Domain.539.015.055 | Rhode Island | urn:lex:us;rhode.island:internal: |
| Domain.539.015.062 | South Carolina | urn:lex:us;south.carolina:internal: |
| Domain.539.015.063 | South Dakota | urn:lex:us;south.dakota:internal: |
| Domain.539.015.064 | Tennessee | urn:lex:us;tennessee:internal: |
| Domain.539.015.065 | Texas | urn:lex:us;texas:internal: |
| Domain.539.015.075 | Utah | urn:lex:us;utah:internal: |
| Domain.539.015.076 | Vermont | urn:lex:us;vermont:internal: |
| Domain.539.015.077 | Virginia | urn:lex:us;virginia:internal: |
| Domain.539.015.078 | Washington | urn:lex:us;washington:internal: |
| Domain.539.015.079 | West Virginia | urn:lex:us;west.virginia:internal: |
| Domain.539.015.080 | Wisconsin | urn:lex:us;wisconsin:internal: |
| Domain.539.015.081 | Wyoming | urn:lex:us;wyoming:internal: |