==5 -- Extent of holdings block== ==Definition and scope of fields== The ''Extent of Holdings Block'' defines fields for recording information about extent data elements ofthe items held by the institution identified in [[hold/252|252 field]]. Data elements are divided into the four groupsof fields that describe captions and pattern, enumeration and chronology, textual holdings informationand item information. These fields cater for four types of items as defined in the [[Hold/Record label|Record Label]], i.e.single-part items, multipart items, serial items and integrating resources, although the most importantapplication is for serial and integrating resources holdings. Within each set of fields, separate fieldsare defined for three categories, i.e. basic bibliographic unit, supplementary materials and indexes. The following fields are defined: *[[hold/500|500 Captions and Pattern – Basic Bibliographic Unit]]*[[hold/501|501 Captions and Pattern – Secondary Bibliographic Unit: Supplementary Materials]]*[[hold/502|502 Captions and Pattern – Secondary Bibliographic Unit : Indexes]]*[[hold/510|510 Enumeration and Chronology – Basic Bibliographic Unit]]*[[hold/511|511 Enumeration and Chronology – Secondary Bibliographic Unit: Supplementary Materials]]*[[hold/512|512 Enumeration and Chronology – Secondary Bibliographic Unit: Indexes]]*[[hold/520|520 Textual Holdings – Basic Bibliographic Unit]]*[[hold/521|521 Textual Holdings – Secondary Bibliographic Unit: Supplementary Materials]]*[[hold/522|522 Textual Holdings – Secondary Bibliographic Unit: Indexes]]*[[hold/530|530 Item Information – Bas ic Bibliographic Unit]]*[[hold/531|531 Item Information – Secondary Bibliographic Unit: Supplementary Materials]]*[[hold/532|532 Item Information – Secondary Bibliographic Unit: Indexes]] ==Punctuation== [https://www.iso.org/standard/18372.html ISO 10324] prescribes the following punctuation for the extent of holding: {| class="wikitable"|-! Symbol !! Name !! Purpose !! Example|-| ''':''' || Colon || Separates the first and second levels of hierarchical bibliographical units. Blanks are not used before or after the colon. || v. 1:pt.1|-| ''',''' || Comma || Indicates a gap in a range of holdings. Blanks are not used before or after the comma. || v.1,v.3|-| '''/''' || Diagonal (slash) || Indicates combined numbering, combined chronology or non-calendar year chronology data. Blanks are not used before or after the diagonal. || v.1/2<br>1969/1970 |-| '''=''' || Equal sign || Separates alternative numbering schemes. Blanks are not used before or after the equal sign. || v.2:no.5 =<br />fasc. 15|-| '''-''' || Hyphen || Indicates an unbroken range of holdings at the same hierarchical level or open holdings. Blanks are not used before or after the hyphen. || v.1-3|-| &lt;&gt; || Angle brackets || Encloses the Specific Extent Note. The opening angle bracket is always preceded by a blank; the closing angle bracket is always followed by a blank. || <nowiki>#&lt;Water-damaged&gt;#</nowiki>|-| ''';''' || Semicolon || Separates two levels of hierarchical bibliographic units below the second level. Blanks are not used before or after the semicolon. || v.1:no.3;pt.6|-| '''?''' || Question mark || Indicates an unknown final digit of a date. || 1950-197?|-| '''“ ”''' || Quotation marks || Enclose the Name of Unit. The opening quotation mark is always preceded by a blank; the closing quotation mark is always followed by a blank. || <nowiki>#”index”#</nowiki>|-| '''? ?''' || Square brackets || Enclose supplied enumeration or chronology. The opening square bracket is always preceded by a blank; the closing square bracket is always followed by a blank. Optionally, encloses enumeration for incomplete parts. || <nowiki>#?1981/1982?#</nowiki>|-| '''( )''' || Parentheses || Separate enumeration and chronology when data are recorded together. Parentheses are neither preceded nor followed by a blank. || v.1(1983)|-| '''+''' || Plus sign || Optionally, separates a bas ic bibliographic unit from a subsequent one or from a secondary bibliographic unit. Blanks are used before and after a plus sign. || <nowiki>#1 booklet#+#</nowiki><br />1 sound recording|-| '''#''' [6] || Blank || Used in examples to indicate separation of data || <nowiki>v.1-9#10#elements within an area.<Tables>#11#<Index></nowiki>|}  [6] - In [https://www.iso.org/standard/18372.html ISO 10324] the blank is indicated by the sign “b” with slash superimposed.