ISURL

ISURL's page prints four Sample Usage formulas and NO results, but unlike ISEMAIL it does carry a real Notes section, and the Notes are the authority for this file: "A fully qualified URL is not required. In other words, 'http' and 'www' are not needed in all cases."; "Valid protocols include ftp, http, https, gopher, mailto, news, telnet, and aim."; "If a URL is flagged as 'False', it may use a top-level domain that isn't on our list." That last bullet means the page itself declines to define the boundary, so this corpus asserts only inputs the Notes settle. Google's ISURL page, read live on 2026-08-31 at https://support.google.com/docs/answer/3256501. BATCH PROVENANCE (batch H, the first Sheets/LibreOffice-only batch). Every function in this batch has x == false in docs/data/compat.json: it is a Google Sheets function that Microsoft does not document at all, so this corpus makes NO claim about it in that engine and nothing here is measured against that vendor's documentation. The authority is Google's own support.google.com function page, cited by full URL and by the date it was read -- Google publishes no version number for these pages, so a bare URL dates nothing. WHAT GOOGLE ACTUALLY PRINTS, WHICH IS LESS THAN IT LOOKS: most of these pages carry a 'Sample Usage' block of FORMULAS WITH NO RESULTS. Where a value below is Google's own published output the note says so; where it is derived from the page's stated semantics the note says that instead, and says from which sentence. No value in this batch was taken from a search snippet, a blog or a mirror. LIBREOFFICE: probed on all four pinned builds (24.2.0.3, 24.8.7.2, 25.2.0.3, 25.8.7.3) in five storage spellings -- plain, _xlfn., COM.MICROSOFT., ORG.OPENOFFICE. and _xlfn.ORG.OPENOFFICE. -- and #NAME? under every one of them, so the expected values below describe Google Sheets and the LibreOffice column records absence.

DERIVED from the Notes bullet "A fully qualified URL is not required. In other words, 'http' and 'www' are not needed in all cases", applied to the page's own second sample input. Google's ISURL page, read live on 2026-08-31 at https://support.google.com/docs/answer/3256501.

The same Notes bullet at its limit -- this is the sample that makes the bullet mean something, since it has neither of the two things the bullet says are not needed. Google's ISURL page, read live on 2026-08-31 at https://support.google.com/docs/answer/3256501.

The page's fourth sample input. It pairs with the Notes bullet about an unlisted top-level domain: Google never publishes the list, so .xyz is asserted TRUE only because the page prints it as a sample of the function. Google's ISURL page, read live on 2026-08-31 at https://support.google.com/docs/answer/3256501.

DERIVED from the Notes bullet "Valid protocols include ftp, http, https, gopher, mailto, news, telnet, and aim." mailto is on that list and is the least URL-looking member of it, which is what makes it worth executing. Google's ISURL page, read live on 2026-08-31 at https://support.google.com/docs/answer/3256501.

DERIVED, and deliberately far from the boundary: the Notes make clear the page will not say where the boundary is, so the only FALSE this corpus asserts is one no protocol or top-level-domain list could rescue. Google's ISURL page, read live on 2026-08-31 at https://support.google.com/docs/answer/3256501.

ISURL's page prints four Sample Usage formulas and NO results, but unlike ISEMAIL it does carry a real Notes section, and the Notes are the authority for this file: "A fully qualified URL is not required. In other words, 'http' and 'www' are not needed in all cases."; "Valid protocols include ftp, http, https, gopher, mailto, news, telnet, and aim."; "If a URL is flagged as 'False', it may use a top-level domain that isn't on our list." That last bullet means the page itself declines to define the boundary, so this corpus asserts only inputs the Notes settle. Google's ISURL page, read live on 2026-08-31 at https://support.google.com/docs/answer/3256501. BATCH PROVENANCE (batch H, the first Sheets/LibreOffice-only batch). Every function in this batch has x == false in docs/data/compat.json: it is a Google Sheets function that Microsoft does not document at all, so this corpus makes NO claim about it in that engine and nothing here is measured against that vendor's documentation. The authority is Google's own support.google.com function page, cited by full URL and by the date it was read -- Google publishes no version number for these pages, so a bare URL dates nothing. WHAT GOOGLE ACTUALLY PRINTS, WHICH IS LESS THAN IT LOOKS: most of these pages carry a 'Sample Usage' block of FORMULAS WITH NO RESULTS. Where a value below is Google's own published output the note says so; where it is derived from the page's stated semantics the note says that instead, and says from which sentence. No value in this batch was taken from a search snippet, a blog or a mirror. LIBREOFFICE: probed on all four pinned builds (24.2.0.3, 24.8.7.2, 25.2.0.3, 25.8.7.3) in five storage spellings -- plain, _xlfn., COM.MICROSOFT., ORG.OPENOFFICE. and _xlfn.ORG.OPENOFFICE. -- and #NAME? under every one of them, so the expected values below describe Google Sheets and the LibreOffice column records absence.

DERIVED from the Notes bullet "A fully qualified URL is not required. In other words, 'http' and 'www' are not needed in all cases", applied to the page's own second sample input. Google's ISURL page, read live on 2026-08-31 at https://support.google.com/docs/answer/3256501.

The same Notes bullet at its limit -- this is the sample that makes the bullet mean something, since it has neither of the two things the bullet says are not needed. Google's ISURL page, read live on 2026-08-31 at https://support.google.com/docs/answer/3256501.

The page's fourth sample input. It pairs with the Notes bullet about an unlisted top-level domain: Google never publishes the list, so .xyz is asserted TRUE only because the page prints it as a sample of the function. Google's ISURL page, read live on 2026-08-31 at https://support.google.com/docs/answer/3256501.

DERIVED from the Notes bullet "Valid protocols include ftp, http, https, gopher, mailto, news, telnet, and aim." mailto is on that list and is the least URL-looking member of it, which is what makes it worth executing. Google's ISURL page, read live on 2026-08-31 at https://support.google.com/docs/answer/3256501.

DERIVED, and deliberately far from the boundary: the Notes make clear the page will not say where the boundary is, so the only FALSE this corpus asserts is one no protocol or top-level-domain list could rescue. Google's ISURL page, read live on 2026-08-31 at https://support.google.com/docs/answer/3256501.

ISURL's page prints four Sample Usage formulas and NO results, but unlike ISEMAIL it does carry a real Notes section, and the Notes are the authority for this file: "A fully qualified URL is not required. In other words, 'http' and 'www' are not needed in all cases."; "Valid protocols include ftp, http, https, gopher, mailto, news, telnet, and aim."; "If a URL is flagged as 'False', it may use a top-level domain that isn't on our list." That last bullet means the page itself declines to define the boundary, so this corpus asserts only inputs the Notes settle. Google's ISURL page, read live on 2026-08-31 at https://support.google.com/docs/answer/3256501. BATCH PROVENANCE (batch H, the first Sheets/LibreOffice-only batch). Every function in this batch has x == false in docs/data/compat.json: it is a Google Sheets function that Microsoft does not document at all, so this corpus makes NO claim about it in that engine and nothing here is measured against that vendor's documentation. The authority is Google's own support.google.com function page, cited by full URL and by the date it was read -- Google publishes no version number for these pages, so a bare URL dates nothing. WHAT GOOGLE ACTUALLY PRINTS, WHICH IS LESS THAN IT LOOKS: most of these pages carry a 'Sample Usage' block of FORMULAS WITH NO RESULTS. Where a value below is Google's own published output the note says so; where it is derived from the page's stated semantics the note says that instead, and says from which sentence. No value in this batch was taken from a search snippet, a blog or a mirror. LIBREOFFICE: probed on all four pinned builds (24.2.0.3, 24.8.7.2, 25.2.0.3, 25.8.7.3) in five storage spellings -- plain, _xlfn., COM.MICROSOFT., ORG.OPENOFFICE. and _xlfn.ORG.OPENOFFICE. -- and #NAME? under every one of them, so the expected values below describe Google Sheets and the LibreOffice column records absence.

DERIVED from the Notes bullet "A fully qualified URL is not required. In other words, 'http' and 'www' are not needed in all cases", applied to the page's own second sample input. Google's ISURL page, read live on 2026-08-31 at https://support.google.com/docs/answer/3256501.

The same Notes bullet at its limit -- this is the sample that makes the bullet mean something, since it has neither of the two things the bullet says are not needed. Google's ISURL page, read live on 2026-08-31 at https://support.google.com/docs/answer/3256501.

The page's fourth sample input. It pairs with the Notes bullet about an unlisted top-level domain: Google never publishes the list, so .xyz is asserted TRUE only because the page prints it as a sample of the function. Google's ISURL page, read live on 2026-08-31 at https://support.google.com/docs/answer/3256501.

DERIVED from the Notes bullet "Valid protocols include ftp, http, https, gopher, mailto, news, telnet, and aim." mailto is on that list and is the least URL-looking member of it, which is what makes it worth executing. Google's ISURL page, read live on 2026-08-31 at https://support.google.com/docs/answer/3256501.

DERIVED, and deliberately far from the boundary: the Notes make clear the page will not say where the boundary is, so the only FALSE this corpus asserts is one no protocol or top-level-domain list could rescue. Google's ISURL page, read live on 2026-08-31 at https://support.google.com/docs/answer/3256501.