|First Indicator||Second Indicator|
|Type of meeting name entry element
0 - Inverted name
1 - Jurisdiction name
2 - Name in direct order
|111 - Undefined
# - Undefined
611 - Thesaurus
0 - Library of Congress Subject Headings
1 - LC subject headings for children's literature
2 - Medical Subject Headings
3 - National Agricultural Library subject authority file
4 - Source not specified
5 - Canadian Subject Headings
6 - Répertoire de vedettes-matière
7 - Source specified in subfield $2
711 - Undefined
# - Undefined
Name and title portions
Subject subdivision portion
Subelements occurring in meeting name fields. A named meeting that is entered under a corporate name is contained in the X10 fields. Corporate names that include such words as conference or congress are also contained in the X10 fields. For example, the Congress of Neurological Surgeons, a professional group, is a corporate name.
Guidelines for applying all content designators except the second indicator position are given in this section. A field-specific list of content designators and guidelines for applying the second indicator position are provided under the description for each specific X11 field.
First Indicator - Type of meeting name entry element
Form of the entry element of the field. The values distinguish among an inverted personal name, a jurisdiction name, and a meeting name in direct order used as the entry element.
Meeting name begins with a personal name in inverted order (surname, forename). Meeting names beginning with a personal surname alone, a personal name in direct order (not inverted), or containing a personal name other than as the entry element are identified by value 2.
Jurisdiction name under which a meeting name is entered. Meeting names containing a jurisdiction name as an integral part of the name or qualified by a jurisdiction name are identified by value 2.
Heading may contain a parenthetical qualifier or may be an acronym or initialism.
Unique to the function of the meeting name field. It is described under the following fields: 111 (Primary Name-Meeting); 611 (Subject Added Entry-Meeting Name); or 711 (Added Entry-Meeting Name).
$a - Meeting name or jurisdiction name as entry element
Name of a meeting or a jurisdiction name under which a meeting is entered. Parenthetical qualifying information is not separately subfield coded.
$c - Location of meeting
Place name or a name of an institution where a meeting is held. Multiple adjacent locations are contained in a repeatable subfield $c.
Place name is added parenthetically to a meeting name to distinguish between identical names is not separately subfield coded.
$d - Date of meeting
Date is added parenthetically to a meeting name to distinguish between identical names is not separately subfield coded.
$e - Subordinate unit
Name of a subordinate unit entered under a meeting name.
$f - Date of a work [611/711]
Date of publication used with a title of a work in a name/title field.
$g - Miscellaneous information
Data element that is not more appropriately contained in another defined subfield.
$j - Relator term
Describes the relationship between a name and a community information entity.
$n - Number of part/section/meeting
In music uniform titles, the serial, opus, or thematic index number, or a date used to distinguish one work from another, is contained in subfield $n.
Multiple alternative numberings (often separated by a comma) are contained in a single subfield $n. Multiple numberings that are hierarchical (often separated by a period) are contained in separate occurrences of subfield $n.
$p - Name of part/section [611/711]
Name designation of a part/section of a work used with a title in a name/title field. It can also contain a name designation of a part/section of an event, program, etc. used with a title of an event, program, etc. in a name/title field.
$q - Name of meeting following jurisdiction name entry element
Meeting name that is entered under a jurisdiction name contained in subfield $a.
$s - Version [611/711]
Version, edition, etc., information added to a title of a work in a name/title field.
$t - Title [611/711]
Title page title of a work or the name of an event, program, etc. used in a name/title field.
$u - Affiliation
Affiliation or address of the meeting or conference.
$v - Form subdivision 
Form subdivision that designates a specific kind or genre of material as defined by the thesaurus being used. Subfield $v is appropriate only when a form subject subdivision is added to a meeting name or name/title heading to form an extended subject heading. Subfield $v is used for form terms when they function as indicated above. Subfield $x may be used if the terms function as general subdivisions. A form subdivision in subfield $v is generally the last subfield in the field. The subfield may be repeated if more than one form subdivision is used.
|611||20$aPurdue Pest Control Conference$vPeriodicals.|
|611||20$aInternational Congress of Writers for the Defense of Culture$n(1st :$d1935:$cParis, France)$vFiction.|
$x - General subdivision 
Subject subdivision that is not more appropriately contained in subfield $v (Form subdivision), subfield $y (Chronological subdivision) or subfield $z (Geographic subdivision). Subfield $x is appropriate only when a general topical subdivision is added to a name or a name/title.
$y - Chronological subdivision 
Subject subdivision that represents a period of time. Subfield $y is appropriate only when a chronological subject subdivision is added to a name or a name/title field.
$z - Geographic subdivision 
Geographic subject subdivision. Subfield $z is appropriate only when a geographic subject subdivision is added to a name or a name/title field.
$0 - Authority record control number or standard number
$2 - Source of heading or term 
MARC code that identifies the thesaurus or authority file that is the source list from which the heading or term in a Subject Added Entry field was assigned. It is used only when the second indicator position contains value 7 (Source specified in subfield $2). Code from: Subject Heading and Term Source Codes.
$4 - Relator code
MARC code that specifies the relationship between a name and a community information entity. More than one relator code may be used if the meeting has more than one function. Code from: MARC Code List for Relators. The code is given after the name portion in name/title fields.
$6 - Linkage
$8 - Field link and sequence number
Ambiguous Headings - See Appendix D: Ambiguous Headings.
Punctuation - Fields 111, 611, and 711 end with a mark of punctuation or a closing parenthesis. If the final subfield is subfield $0, $2 or $4, the mark of punctuation or closing parenthesis precedes these subfields. The name portion of a name/subordinate body or name/title field ends with a mark of punctuation. The mark of punctuation is placed inside a closing quotation mark. A name or title portion followed by a subject subdivision does not end with a mark of punctuation unless the name or title portion ends with an abbreviation, initial/letter, or open date.
Spacing - No spaces are used in initialisms or personal name initials/letters. One space is used between preceding and succeeding initials if an abbreviation consists of more than a single phrase.
Display Constant - Dash that precedes a subject subdivision in an extended subject heading is not carried in the machine-readable record. It may be system generated as a display constant associated with the content of subfields $v, $x, $y, and $z.
Initial Articles - Initial articles (e.g., Het) occurring at the beginning of name heading fields are usually omitted in most languages (except when the intent is to file on the article). Initial articles occurring at the beginning of the title and/or part portion of a name/title added entry (i.e., 611 or 711) are also omitted. Any diacritics and/or special characters occurring at the beginning of fields are retained. Note that such characters are usually ignored for purposes of sorting and filing.
In 2014, subfield $c was made repeatable.