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Information in the IGI came from two sources:  
Information in the IGI came from two sources:  


1.  '''Indexed:''' Some of the entries in the IGI were indexed by the genealogical community from collections of vital and church records (approx. 460 million names). Indexed records are valuable sources of primary information. Unfortunately, attempts to prevent duplication resulted in the exclusion of some indexed records.  
1. '''Indexed:''' Some of the entries in the IGI were indexed by the genealogical community from collections of vital and church records (approx. 460 million names). Indexed records are valuable sources of primary information. Unfortunately, attempts to prevent duplication resulted in the exclusion of some indexed records.  


2.  '''Contributed:''' Some of the information in the IGI was contributed by members of the Church about their ancestors (approx. 430 million names). The quality of this information varies. Duplicate entries and inconsistent information are common. Always verify contributed entries against sources of primary information.  
2. '''Contributed:''' Some of the information in the IGI was contributed by members of the Church about their ancestors (approx. 430 million names). The quality of this information varies. Duplicate entries and inconsistent information are common. Always verify contributed entries against sources of primary information.  


== Accessing the International Genealogical Index  ==
== Accessing the International Genealogical Index  ==
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Today’s implementation of the International Genealogical Index addresses key deficiencies in the previous implementation. However, it is not able to correct all of them.  
Today’s implementation of the International Genealogical Index addresses key deficiencies in the previous implementation. However, it is not able to correct all of them.  


1.  Previously, the IGI could not be searched by city or parish name, but only by country and one subdivision (such as U.S. state or U.K. county). Users compensated by searching by batch number. While batch number searching is still supported, most users will prefer searching by name instead of number.  
1. Previously, the IGI could not be searched by city or parish name, but only by country and one subdivision (such as U.S. state or U.K. county). Users compensated by searching by batch number. While batch number searching is still supported, most users will prefer searching by name instead of number.  


2.  Previously, indexed entries and community contributed entries were mixed into a single collection. The reliability of the two is different, so users needed to know the source of each result. Users compensated by examining the first digit of the batch number of each result. Batch number charts assisted users in recognizing indexed (“extracted”) entries and user contributed entries. Today, the two types are searched separately, assisting users to distinguish between them.  
2. Previously, indexed entries and community contributed entries were mixed into a single collection. The reliability of the two is different, so users needed to know the source of each result. Users compensated by examining the first digit of the batch number of each result. Batch number charts assisted users in recognizing indexed (“extracted”) entries and user contributed entries. Today, the two types are searched separately, assisting users to distinguish between them.  


3.  While it grew to contain a tremendous amount of duplication, the IGI was originally envisioned as a file containing just one entry for each birth and each marriage that has ever occurred. When new records were indexed, entries were discarded that duplicated existing IGI entries. To compensate for this limitation, when an entry is not found among indexed entries, search the community contributed entries as well.  
3. While it grew to contain a tremendous amount of duplication, the IGI was originally envisioned as a file containing just one entry for each birth and each marriage that has ever occurred. When new records were indexed, entries were discarded that duplicated existing IGI entries. To compensate for this limitation, when an entry is not found among indexed entries, search the community contributed entries as well.  


4.  The original sources for entries in the IGI are not shown. For an indexed entry, look up the film number in the FamilySearch or FamilySearch Catalog. For a community contributed entry, the contributor may or may not have specified a source. See “[[Finding the Source of IGI Batch Numbers|Finding the Source of IGI Batch Numbers]]” for more information.  
4. The original sources for entries in the IGI are not shown. For an indexed entry, look up the film number in the FamilySearch or FamilySearch Catalog. For a community contributed entry, the contributor may or may not have specified a source. See “[[Finding the Source of IGI Batch Numbers|Finding the Source of IGI Batch Numbers]]” for more information.  


== History  ==
== History  ==
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{| width="100%" cellspacing="0" cellpadding="0" border="0" class="FCK__ShowTableBorders"
{| width="100%" cellspacing="0" cellpadding="0" border="0" class="FCK__ShowTableBorders"
|-
|-
| style="text-align: right; white-space: nowrap" | 1973  
| style="text-align: right; white-space: nowrap" | 1973  
| Originally published as “the Computer File Index.” Published on microfiche. Contained 20 million entries. About 80% were extracted.<br>
| Originally published as “the Computer File Index.” Published on microfiche. Contained 20 million entries. About 80% were extracted.<br>
|-
|-
| style="text-align: right; white-space: nowrap" | 1975 &nbsp;
| style="text-align: right; white-space: nowrap" | 1975  
| Microfiche edition with 34 million names.
| Microfiche edition with 34 million names.
|-
|-
| style="text-align: right; white-space: nowrap" | 1981 &nbsp;
| style="text-align: right; white-space: nowrap" | 1981  
| This, the 4th edition, was the first to be called the International Genealogical Index. Contained 81 million entries.
| This, the 4th edition, was the first to be called the International Genealogical Index. Contained 81 million entries.
|-
|-
| style="text-align: right; white-space: nowrap" | 1984 &nbsp;
| style="text-align: right; white-space: nowrap" | 1984  
| Record count was 108 million. Offered for sale to the public.
| Record count was 108 million. Offered for sale to the public.
|-
|-
| style="text-align: right; white-space: nowrap" | 1988 &nbsp;
| style="text-align: right; white-space: nowrap" | 1988  
| First published on compact disc (CD-ROM). Part of the FamilySearch DOS computer program. Contained 147 million names. Excluded some indexed entries from the 1984 edition.
| First published on compact disc (CD-ROM). Part of the FamilySearch DOS computer program. Contained 147 million names. Excluded some indexed entries from the 1984 edition.
|-
|-
| style="text-align: right; white-space: nowrap" | 1992 &nbsp;
| style="text-align: right; white-space: nowrap" | 1992  
| Microfiche edition. Contained 187 million names. About 94.5% were indexed.
| Microfiche edition. Contained 187 million names. About 94.5% were indexed.
|-
|-
| style="text-align: right; white-space: nowrap" | March 1993 &nbsp;
| style="text-align: right; white-space: nowrap" | March 1993  
| CD-ROM edition. Contained over 200 million names from over 90 countries.
| CD-ROM edition. Contained over 200 million names from over 90 countries.
|-
|-
| style="text-align: right; white-space: nowrap" | July 1994 &nbsp;
| style="text-align: right; white-space: nowrap" | July 1994  
| CD-ROM release of the 1994 edition issued as an addendum with 42 million entries. Includes entries dropped from the 1988 edition. Duplication rate increased over previous editions.
| CD-ROM release of the 1994 edition issued as an addendum with 42 million entries. Includes entries dropped from the 1988 edition. Duplication rate increased over previous editions.
|-
|-
| style="text-align: right; white-space: nowrap" | 1997 &nbsp;
| style="text-align: right; white-space: nowrap" | 1997  
| CD-ROM addendum increased entries from 240 to 284 million, of which 100 million were from extraction.
| CD-ROM addendum increased entries from 240 to 284 million, of which 100 million were from extraction.
|-
|-
| style="text-align: right; white-space: nowrap" | 24 May 1999 &nbsp;
| style="text-align: right; white-space: nowrap" | 24 May 1999  
| FamilySearch website released. Not all 285 million IGI entries available immediately, but were released by region.
| FamilySearch website released. Not all 285 million IGI entries available immediately, but were released by region.
|-
|-
| style="text-align: right; white-space: nowrap" | April 2010 &nbsp;
| style="text-align: right; white-space: nowrap" | April 2010  
| Divided into several historical records collections and a user-contributed collection on a new version of the FamilySearch website.
| Divided into several historical records collections and a user-contributed collection on a new version of the FamilySearch website.
|-
|-
| style="text-align: right; white-space: nowrap" | June 2012 &nbsp;
| style="text-align: right; white-space: nowrap" | June 2012  
| Original IGI retired along with the original FamilySearch website.
| Original IGI retired along with the original FamilySearch website.
|}
|}
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