共查询到20条相似文献，搜索用时 15 毫秒
1.
《国际机读目录格式手册:书目格式》(以下简称《UNIMARC手册》)(第3版)于2008年正式出版,它包含了2005年以来《UNIMARC手册》(第2版)第5次更新后的格式变化。《UNIMARC手册》(第3版)的修订主要包括以下几个方面:扩展了字段链接,设立了003字段永久记录标识,增加了字段的功能,新增了字段,部分字段增加了子字段,改变了部分字段名称和字段的功能,改变了部分字段指示符的值。目前《UNIMARC手册》(第4版)的修订工作正在进行,它将使UNIMARC进一步适应编目对象的多样化,适应不断变化、更新的新技术和新编目规则,提高网络环境下UNIMARC的可用性。 相似文献
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在古籍CNMARC书目数据中,3-附注块的信息,对揭示文献的某些特征具有重要的参考价值,同时能为读者提供全面的检索服务。文章通过大量的实例,描述了彼此相关、极易混淆的几个附注字段和其他常见的附注字段,以便更好地了解古籍著录附注项的必要性和重要性。 相似文献
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图版及图是书目数据的描述内容,其涉及的CNMARC字段主要有105和215字段.对比分析《中国文献编目规则》和CNMARC105字段的“图表代码”可得,图版及图的CNMARC书目数据编制应以《国际标准书目著录》(统一版)为指导,进一步加强《中国文献编目规则》与CNMARC的协调性,将图版列为215字段$a子字段的描述内容,以重要性、顺序性和对应性等原则和方法著录215字段$c子字段,填写105字段的“图表代码”. 相似文献
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图书语种的著录与识别 总被引：2，自引：0，他引：2
在CNMARC格式中，“101作品语种”是专门用来标识文献语种的字段。该字段总共提供了10个子字段用来著录文献的语种，除$a（正文语种）为必备子字段外，其它子字段是否使用则要根据所编文献的具体情况而定。该字段的“指示符1”还针对所编文献是“原作”、“译本”或“含译文”，分别指定了三种取值：0、1、2。由于图书文献总是通过一定的语言文字来描述的，所以101字段也是机读书目记录中的一个必备字段。 相似文献
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CNMARC与USMARC中款目连接块比较浅析 总被引：4，自引：0，他引：4
本文对字段安排及批示符设置、子字段标识符和连接形式四方面分别加以比较,认为ＣＮＭＡＲＣ与ＵＳＭＡＲＣ对相关书目信息的选择取基本一致,因而在两种ＭＡＲＣ之间可找到连接块的各对应字段,但各对应字段的安排及标识却有极大差异。文章指出,尽管具体处理方式不同,但两种ＭＡＲＣ都达到相同的目的,即妆和著录实体相关的其它书目实体,为相关记录提供机检,并通过指示符控制是否生成附注。因此可以说,ＣＮＭＡＲＣ和ＵＳＭＡ 相似文献
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周显元 《现代图书情报技术》1997,(1)
“格式一体化”(FormatIntegration)是指USMARC书目数据中的七种不同资料(图书、计算机文件、地图、乐谱、连续出版物、可视资料、档案/手稿控制)格式的一体化。在“格式一体化”之前,这七种格式的说明书为适应相应的资料格式而分别定义字段、指示符和子字段;某些字段、子字段只适合于某种特殊格式而不能用来描述另一种格式的资料;也没有完整的办法来著录那些不止一种载体或格式(如,连续出版的计算机文件、乐谱的手稿或拼图式的地图)的资料特征。“格式一体化”中的“一体化”是指不同类型资料共同使用一个一体化的MARC书目格式。“格… 相似文献
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书目数据标准化是实现文献资源共建共享和联机联合编目的基础与前提。我国书目数据标准化面临的主要障碍包括:英文文献编目中MARC格式的选用不统一,编目系统个别字段功能的设计不规范,对简化编目的认识不统一,《中国机读目录格式使用手册(修订版)》存在不当之处,对多卷书的处理不统一,联合编目机构之间缺乏协调,等等。 相似文献
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CALIS联合编目数据3XX字段的正确使用及其与国图数据3XX字段的比较 总被引：3，自引：0，他引：3
在CALIS编目工作中,相对于检索字段而言,3XX附注字段一直是比较薄弱的环节。实际上,要想真正实现CALIS数据“整体化、标准化、规范化”的目标,就必须十分重视3XX字段的著录规则。本文对CALIS3XX字段中容易混淆的几个字段进行分析探讨,概括归纳出正确使用这些字段的一些规律和方法。 相似文献
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通过对《中国文献编目规则》和《资源描述与检索》(RDA)的一般文献类型标识、资源类型与数量项、载体形态项、附注、标准编号5个方面的对比分析发现,RDA关于数字资源著录的条款更多,规定更具体,内容更丰富,体现出RDA不仅适用于传统类型文献的著录,更能适用于电子资源这一文献类型的著录。RDA取代AACR2是大势所趋,《中国文献编目规则》也应顺应文献资源种类和格式变化的要求,适时作出修改,以满足数字时代和网络时代的需求。 相似文献
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针对《对合订题名文献著录方法的比较分析》一文中关于合订文献直接做CNMARC书目格式423字段的观点是一完全错误的做法,以及CNMARC书目格式423字段完全是一多余字段的论述予以回复,并呼吁国内编目界的同仁要重视CNMARC书目格式中的数据关联(含系统内的数据关联和系统间的数据关联)问题. 相似文献
11.
USMARC是美国国会图书馆早期研制的一种机读目录格式,USMARC格式中的041字段和CNMARC格式的101字段都属于语种著录字段。作者通过工作实践对这两个字段进行比较分析,并解答了实际工作中经常遇到的问题。USMARC041宁段作为著录西文文献语种有则必备的字段容易被漏著或错著。因此,使用USMARC041字段著录时需注意与041相关字段的前后对应关系,041字段第1指示符著入时易发生的误判情况,除$a子字段外的其它子宁段的标识。 相似文献
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文章重点阐述光盘出版物著录中常用字段、子字段的内容揭示，探讨这类文献在CN-MARC著录中的特殊性和规范著录的方法。 相似文献
13.
Victor Pickard 《Critical Studies in Media Communication》2016,33(4):337-351
The field of communication has much to recover from its intellectual history, particularly critical traditions that have been pushed to the margins. Such a project is inherently political: how scholars narrate the histories of their fields reflect tacit assumptions about discursive boundaries and what counts for legitimate scholarship. Prominent historical narratives typically emphasize certain sub-fields and research traditions while giving short shrift to others. Suggesting larger erasures and deeper tensions in the history of the field, this article aims to recover one such neglected thread, embodied by a reformist policy scholar who is all but forgotten in communication research: Charles Siepmann. 相似文献
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《信息与文献 参考文献著录规则》新标准中增添档案文献类型标识及著录示例的举措,解决了困扰学界已久的注释与参考文献中档案类文献的混排现象。新标准在实践中仍旧存在档案涵义失当、档案著录规则不明及示例有误等问题。建议该标准在修订时需在厘清档案与相关事物间关系的基础上,明确档案概念内涵,对档案著录的通用要素加以选择与界定,给出正确的档案著录示例。 相似文献
16.
《Journal of Informetrics》2022,16(2):101281
Main Path Analysis (MPA) is widely used to trace the developmental trajectory of a technological field through a citation network. The citation-based traversal weight is usually utilized to cherry-pick the most significant path. However, the theme of documents along a main path may not be so coherent, and it is very possible to miss the main paths of significant sub-fields overall in a domain. Furthermore, the global path search algorithm in conventional MPA also suffers from high space complexity due to the exhaustive strategy. To address these limitations, a new method, named as semantic MPA (sMPA), is proposed by leveraging semantic information in two steps of candidate path generation and main path selection. In the meanwhile, the resulting source code can be freely accessed. To demonstrate the advantages of our method, extensive experiments are conducted on a patent dataset pertaining to lithium-ion battery in electric vehicle. Experimental results show that our sMPA is capable of discovering more knowledge flows from important sub-fields, and improving the topical coherence of candidate paths as well. 相似文献
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In this paper, we develop a novel methodology within the IDCP measuring framework for comparing normalization procedures based on different classification systems of articles into scientific disciplines. Firstly, we discuss the properties of two rankings, based on a graphical and a numerical approach, for the comparison of any pair of normalization procedures using a single classification system for evaluation purposes. Secondly, when the normalization procedures are based on two different classification systems, we introduce two new rankings following the graphical and the numerical approaches. Each ranking is based on a double test that assesses the two normalization procedures in terms of the two classification systems on which they depend. Thirdly, we also compare the two normalization procedures using a third, independent classification system for evaluation purposes. In the empirical part of the paper we use: (i) a classification system consisting of 219 sub-fields identified with the Web of Science subject-categories; an aggregate classification system consisting of 19 broad fields, as well as a systematic and a random assignment of articles to sub-fields with the aim of maximizing or minimizing differences across sub-fields; (ii) four normalization procedures that use the field or sub-field mean citations of the above four classification systems as normalization factors; and (iii) a large dataset, indexed by Thomson Reuters, in which 4.4 million articles published in 1998–2003 with a five-year citation window are assigned to sub-fields using a fractional approach. The substantive results concerning the comparison of the four normalization procedures indicate that the methodology can be useful in practice. 相似文献
18.
MARC著录意识主要体现在检索意识、整体意识、规范意识、维护意识4个方面。编目员可以采用提取文献题名关键词、复合主题词轮排、多学科文献多重标引、建立题名等方法,谩化MARC字段的检索功能;也可以利用字段、代码之间的内在逻辑关系,科学著录文献,通过905字段对有关MARC记录作关联性技术处理,从而提高MARC著录意识。 相似文献
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R H Orr V M Pings I H Pizer E E Olson C C Spencer 《Bulletin of the Medical Library Association》1968,56(3):241-267
A method of measuring a library's capability for providing the documents its users need has been developed. The library is tested with a representative sample of such documents to determine how long would be required for users to obtain these documents. Test results are expressed in terms of a Capability Index, which has a maximal value of 100 only if all the sample documents are found "on shelf." Specific tests employing samples of 300 documents have been developed that are appropriate for academic and for "reservoir" biomedical libraries. Realistic field trials have demonstrated that these two tests are practical to administer and that test results are adequately reproducible. When strict comparability is not important, a library can test itself. In assessing a reservoir library, test results are supplemented by data on its typical processing time for interlibrary loan requests. Currently these tests are being used in a national survey. The general method is applicable to other types of libraries, provided appropriate test samples are established. If their limitations are clearly understood, these "Document Delivery Tests" can be valuable tools for planning and managing library services. 相似文献
20.
简述了网络数字化信息时代“信息过载”和泛滥的基本困境,并回顾了图书馆不同历史时期的资源组织对象——文献、信息和知识。指出信息量愈是几何级数般扩张,知识需求愈是收敛这一基本观点。对当今有些泛化的知识服务理论进行了探讨,明确引入情报学视角的智能性和针对性。 相似文献